Catalytic radical difluoromethoxylation of arenes and heteroarenes
作者:Johnny W. Lee、Weijia Zheng、Cristian A. Morales-Rivera、Peng Liu、Ming-Yu Ngai
DOI:10.1039/c8sc05390a
日期:——
Intermolecular C–H difluoromethoxylation of (hetero)arenes remains a long-standing and unsolved problem in organic synthesis. Herein, we report the first catalytic protocol employing a redox-active difluoromethoxylating reagent 1a and photoredox catalysts for the direct C–H difluoromethoxylation of (hetero)arenes. Our approach is operationally simple, proceeds at room temperature, and uses bench-stable
[EN] DIFLUOROMETHOXYLATION AND TRIFLUOROMETHOXYLATION COMPOSITIONS AND METHODS FOR SYNTHESIZING SAME<br/>[FR] COMPOSITIONS DE DIFLUOROMÉTHOXYLATION ET DE TRIFLUOROMÉTHOXYLATION ET LEURS PROCÉDÉS DE SYNTHÈSE
申请人:UNIV NEW YORK STATE RES FOUND
公开号:WO2019168874A1
公开(公告)日:2019-09-06
The present invention provides a compound having the structure (I), a processing of making the compound; and a process of using the compound as a reagent for the difluoromethoxylation and trifluoromethoxylation of arenes or heteroarenes.
Redox‐Neutral TEMPO Catalysis: Direct Radical (Hetero)Aryl C−H Di‐ and Trifluoromethoxylation
作者:Johnny W. Lee、Sanghyun Lim、Daniel N. Maienshein、Peng Liu、Ming‐Yu Ngai
DOI:10.1002/anie.202009490
日期:2020.11.23
Applications of TEMPO. catalysis for the development of redox‐neutral transformations are rare. Reported here is the first TEMPO.‐catalyzed, redox‐neutralC−Hdi‐ and trifluoromethoxylation of (hetero)arenes. The reaction exhibits a broad substrate scope, has high functional‐group tolerance, and can be employed for the late‐stage functionalization of complex druglike molecules. Kinetic measurements
TEMPO 的应用。氧化还原中性转化发展的催化作用很少见。这里报道的是第一个TEMPO 。(杂)芳烃的催化氧化还原中性 C−H 二氟甲氧基化和三氟甲氧基化。该反应表现出广泛的底物范围,具有较高的官能团耐受性,可用于复杂药物分子的后期功能化。动力学测量、催化中间体的分离和重新研究、UV/Vis 研究和 DFT 计算支持了所提出的氧化 TEMPO 。/TEMPO +氧化还原催化循环。机理研究还表明Li 2 CO 3在防止催化剂失活方面发挥着重要作用。这些发现将为通过氧化还原中性 TEMPO 设计和开发新型反应提供新的见解。催化。
17BETA-HYDROXYSTEROID DEHYDROGENASE TYPE 3 INHIBITORS FOR THE TREATMENT OF ANDROGEN DEPENDENT DISEASES
申请人:SCHERING CORPORATION
公开号:EP1423381B1
公开(公告)日:2007-01-03
DIFLUOROMETHOXYLATION AND TRIFLUOROMETHOXYLATION COMPOSITIONS AND METHODS FOR SYNTHESIZING SAME
申请人:The Research Foundation for the State University of New York
公开号:US20210032181A1
公开(公告)日:2021-02-04
The present invention provides a compound having the structure:
a processing of making the compound; and a process of using the compound as a reagent for the difluoromethoxylation and trifluoromethoxylation of arenes or heteroarenes.