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Articles by Dawei Ma
Pin22 of ADXL312, reserved , must be connected to GND which specified in datasheet.
Hello, There are three reserved pins on ADXL312, pin2, pin7 and pin 22. In rev.C datasheet, description on them listed below. Pin2, reserved, This pin must be connected to VS or left open. Pin7, reserved, This pin must be left open. Pin22, reserved, This pin must be connected to GND. In my schematic, Pin2 and Pin7 are left to open, Pin22 is connected to GND. But I found that pin22 is left open in the schematic of ADXL312 EVAL BOARD, 301-626.
Assembly of Biaryl Amines via Mild Copper-Catalyzed Coupling of Anilines with (Hetero)aryl Chlorides/Bromides
Organic Letters Cite this: Org. Lett. 2025, XXXX, XXX Click to copy citationCitation copied! Learn about these metrics Article Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days. Citations are the number of other articles citing this article, calculated by Crossref and updated daily.
Unveiling the Mechanics Behind Polyimide’s Friction-Greening Phenomenon
All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.
Landscape Perception in Cultural and Creative Industrial Parks: Integrating User-Generated Content (UGC) and Electrodermal Activity Insights
All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.
Global Climate Change, Mental Health, and Socio-Economic Stressors: Toward Sustainable Interventions across Regions
All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.
Biosynthesis of the highly oxygenated tetracyclic core skeleton of Taxol - Nature Communications
Abstract Taxol is a widely-applied anticancer drug that inhibits microtubule dynamics in actively replicating cells. Although a minimum 19-step biosynthetic pathway has been proposed and 16 enzymes likely involved have been characterized, stepwise biosynthetic reactions from the well-characterized di-oxygenated taxoids to Taxol tetracyclic core skeleton are yet to be elucidated.
Nucleophilic Aromatic Substitution of Heteroaryl Halides with Thiols
The nucleophilic aromatic substitution (SNAr) between heteroaryl halides (Cl, Br) and thiols proceeds smoothly in DMAc under the action of K2CO3 at rt–100 °C. For most electron-deficient heteroarenes, reaction takes place without introducing an additional electron-withdrawing group. For electron-rich heteroarenes, an additional electron-withdrawing group such as a simple ester, keto, cyano, and nitro group is required to ensure the reaction completes.
Nucleophilic Aromatic Substitution of Heteroaryl Halides with Thiols
The nucleophilic aromatic substitution (SNAr) between heteroaryl halides (Cl, Br) and thiols proceeds smoothly in DMAc under the action of K2CO3 at rt–100 °C. For most electron-deficient heteroarenes, reaction takes place without introducing an additional electron-withdrawing group. For electron-rich heteroarenes, an additional electron-withdrawing group such as a simple ester, keto, cyano, and nitro group is required to ensure the reaction completes.
CuI/Oxalamide-Catalyzed Coupling Reaction of (Hetero)aryl Halides with Sodium Nitrite
The N,N′-bis(thiophen-2-ylmethyl)oxalamide (BTMO) was found to be an effective ligand for Cu-catalyzed ipso-nitration of (hetero)aryl halides (Br, I), making the coupling reaction with sodium nitrite proceed smoothly at 100–120 °C with 1–5 mol % CuI and BTMO. Electron-rich substrates were the best coupling partners to give the desired coupling products in good to excellent yields at 100 °C.
CuI/Oxalamide-Catalyzed Coupling Reaction of (Hetero)aryl Halides with Sodium Nitrite
The N,N′-bis(thiophen-2-ylmethyl)oxalamide (BTMO) was found to be an effective ligand for Cu-catalyzed ipso-nitration of (hetero)aryl halides (Br, I), making the coupling reaction with sodium nitrite proceed smoothly at 100–120 °C with 1–5 mol % CuI and BTMO. Electron-rich substrates were the best coupling partners to give the desired coupling products in good to excellent yields at 100 °C.
Copper‐Catalyzed α‐Arylation of Nitroalkanes with (Hetero)aryl Bromides/Iodides
Conflict of interest The authors declare no conflict of interest. Supporting Information As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors.
Assembly of (Hetero)aryl Thioethers via Simple Nucleophilic Aromatic Substitution and Cu-Catalyzed Coupling Reaction with (Hetero)aryl Chlorides and Bromides under Mild Conditions
Assembly of (Hetero)aryl Thioethers via Simple Nucleophilic Aromatic Substitution and Cu-Catalyzed Coupling Reaction with (Hetero)aryl Chlorides and Bromides under Mild Conditions The requirement of higher reaction temperatures for a SNAr reaction between thiols and less reactive electron-poor aryl halides in early reports has triggered intensive studies on the development of metal- and photo-catalyzed methods to promote this transformation.
Relationship between Visual and Thermal Comfort and Electrodermal Activity in Campus Blue-Green Spaces: A Case Study of Guangzhou, China
1. Introduction With the rapid pace of urbanization, urban green and blue spaces have become essential components of the urban ecosystem, playing pivotal roles in promoting sustainable urban development and enhancing residents’ physical and mental well-being []. However, the effectiveness and ecological benefits of these spaces are often constrained by environmental factors such as the urban heat island effect, which limit these spaces’ accessibility and comfort [].
Adaptability Evaluation of the Spatiotemporal Fusion Model of Sentinel-2 and MODIS Data in a Typical Area of the Three-River Headwater Region
Abstract : The study of surface vegetation monitoring in the “Three-River Headwaters” Region (TRHR) relies on satellite data with high spatial and temporal resolutions. The spatial and temporal fusion method for multiple data sources can effectively overcome the limitations of weather, the satellite return period, and funding on research data to obtain data higher spatial and temporal resolutions.
Asymmetric Palladium‐Catalyzed Dearomative Intramolecular N‐Alkylation Reaction: Enantioselective Total Synthesis of (−)‐Spiroquinazoline
Abstract Tricyclic imidazo[1,2-a]-indol-3-ones have been found in several classes of alkaloids. We report here an asymmetric approach to instal substituted imidazo[1,2-a]-indol-3-ones, which relied on a Pd/diamidophosphite-catalyzed intramolecular dearomative allylic substitution of 1,3-disubstituted indoles derived from 3-formylindoles and amino acids. Enantioselective total syntheses of (−)-spiroquinazoline and three related alkaloids were achieved. References 1 1a, , , , , J. Am. Chem. Soc.
Cu‐Catalyzed Coupling Reactions of Sulfonamides with (Hetero)Aryl Chlorides/Bromides
Abstract Cu-catalyzed sulfonamidation of (hetero)aryl halides proceeds with excellent reaction scope by using oxalamides or 4-hydroxypicolinamides as the ligands. For bromides, only 2–5 mol % CuI and oxalamides were required. For chlorides, increasing catalytic loadings to 10 mol % Cu2O and ligands was needed. Direct sulfonamidation of four chloro-containing marketed drugs and preparation of two sulfonamide drugs were achieved under these conditions.
Assembly of α‐(Hetero)aryl Nitriles via Copper‐Catalyzed Coupling Reactions with (Hetero)aryl Chlorides and Bromides
Communication Dr. Lanting Xu State Key Laboratory of Bioorganic & Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032 China Search for more papers by this author Dr. Yongwen Jiang State Key Laboratory of Bioorganic & Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic...
Total Synthesis of Kopsinitarine E
Communication Dr. Karre Nagaraju State Key Laboratory of Bioorganic & Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032 China These authors contributed equally to this work.
6‐Methylenebicyclo[3.2.1]oct‐1‐en‐3‐one: A twisted olefin as Diels‐Alder dienophile for expedite syntheses of four kaurane diterpenoids - Ma - - Angewandte Chemie International Edition - Wiley Online Library
Communication 6‐Methylenebicyclo[3.2.1]oct‐1‐en‐3‐one: A twisted olefin as Diels‐Alder dienophile for expedite syntheses of four kaurane diterpenoids Dawei Ma Corresponding Author E-mail address: madw@mail.sioc.ac.cn Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, State Key Lab. of Bio. Nat. Prod.
A scalable total synthesis of Et‐743 and lurbinectedin
The full text of this article hosted at iucr.org is unavailable due to technical difficulties. Communication A scalable total synthesis of Et‐743 and lurbinectedin Dawei Ma Corresponding Author E-mail address: madw@mail.sioc.ac.cn Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, State Key Lab. of Bio. Nat. Prod.
A scalable total synthesis of Et‐743 and lurbinectedin
The full text of this article hosted at iucr.org is unavailable due to technical difficulties. Communication A scalable total synthesis of Et‐743 and lurbinectedin Dawei Ma Corresponding Author E-mail address: madw@mail.sioc.ac.cn Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, State Key Lab. of Bio. Nat. Prod.
Oxidative coupling strategies for the synthesis of indole alkaloids
Direct bond formation between two C–H bonds is most challenging but imperative for efficient organic synthesis. Recently, significant progress has been made in direct functionalization of indole through oxidative coupling reactions with other nucleophiles such as enolates and phenols. Both intermolecular and intramolecular coupling reactions can be conducted under the action of base/oxidants or oxidants alone.
Thiourea‐Catalyzed Asymmetric Michael Addition of Carbazolones to 2‐Chloroacrylonitrile: Total Synthesis of 5,22‐Dioxokopsane, Kopsinidine C, and Demethoxycarbonylkopsin - Ni - 2018 - Angewandte Chemie International Edition - Wiley Online Library
As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re‐organized for online delivery, but are not copy‐edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors.
Thiourea‐Catalyzed Asymmetric Michael Addition of Carbazolones to 2‐Chloroacrylonitrile: Total Synthesis of 5,22‐Dioxokopsane, Kopsinidine C, and Demethoxycarbonylkopsin - Ni - 2018 - Angewandte Chemie International Edition - Wiley Online Library
As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re‐organized for online delivery, but are not copy‐edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors.
Thiourea‐Catalyzed Asymmetric Michael Addition of Carbazolones to 2‐Chloroacrylonitrile: Total Synthesis of 5,22‐Dioxokopsane, Kopsinidine C, and Demethoxycarbonylkopsin - Ni - - Angewandte Chemie International Edition - Wiley Online Library
As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re‐organized for online delivery, but are not copy‐edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors.
A Unified Approach for the Assembly of Atisine‐ and Hetidine‐type Diterpenoid Alkaloids: Total Syntheses of Azitine and the Proposed Structure of Navirine C - Liu - - Angewandte Chemie International Edition - Wiley Online Library
A tetracyclic dinitrile was synthesized in twelve steps from cyclohex‐2‐en‐1‐one by using a chelation‐triggered conjugate addition to a γ‐hydroxy‐substituted α,β‐unsaturated nitrile and an oxidative dearomatization/Diels–Alder cycloaddition cascade as the key steps.
A Unified Approach for the Assembly of Atisine‐ and Hetidine‐type Diterpenoid Alkaloids: Total Syntheses of Azitine and the Proposed Structure of Navirine C - Liu - 2018 - Angewandte Chemie International Edition - Wiley Online Library
As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re‐organized for online delivery, but are not copy‐edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors.
Synthesis of N-(Hetero)aryl Carbamates via CuI/MNAO Catalyzed Cross-Coupling of (Hetero)aryl Halides with Potassium Cyanate in Alcohols
An efficient route to N-(hetero)aryl carbamates was developed through CuI/MNAO [2-((2-methylnaphthalen-1-yl)amino)-2-oxoacetic acid] catalyzed cross-coupling of (hetero)aryl chlorides with potassium cyanate in alcohols at 120–130 °C. This method utilizes broadly available substrates to afford various N-(hetero)aryl carbamates in good to excellent yields.
Convergent Route to ent-Kaurane Diterpenoids: Total Synthesis of Lungshengenin D and 1α,6α-Diacetoxy-ent-kaura-9(11),16-dien-12,15-dione
Convergent Route to ent-Kaurane Diterpenoids: Total Synthesis of Lungshengenin D and 1?,6?-Diacetoxy-ent-kaura-9(11),16-dien-12,15-dioneState Key Laboratory of Bioorganic & Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, ChinaJ. Am. Chem.
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