Transition Metal Free C–N Bond Forming Dearomatizations and Aryl C–H Aminations by in Situ Release of a Hydroxylamine-Based Aminating Agent
摘要:
We outline a simple protocol that accesses directly unprotected secondary amines by intramolecular C-N bond forming dearomatization or aryl C-H amination. The method is dependent on the generation of a potent electrophilic aminating agent released by in situ deprotection of O-Ts activated N-Boc hydroxylamines.
Alkyltriflones in the Ramberg–Bäcklund Reaction: An Efficient and Modular Synthesis of <i>gem</i>-Difluoroalkenes
作者:Yuuki Maekawa、Masakazu Nambo、Daisuke Yokogawa、Cathleen M. Crudden
DOI:10.1021/jacs.0c07924
日期:2020.9.16
of gem-difluoroalkenes through the Ramberg-Bäcklund reaction of alkyl triflones is described herein. Structurally diverse, fully-substituted gem-difluoroalkenes that are difficult to prepare by other methods can be easily prepared from readily available triflones by treatment with specific Grignard reagents. Experimental and computationalstudies provide insight into the unique and critical role of
Chain-Branched acyclic phenethylthiocarbamates as vanilloid receptor antagonists
作者:JungWha Yoon、HyeYoung Choi、Hyun Joo Lee、Chong Hyun Ryu、Hyeung-geun Park、Young-ger Suh、Uhtaek Oh、Yeon Su Jeong、Jin Kyu Choi、Young-Ho Park、Hee-Doo Kim
DOI:10.1016/s0960-894x(03)00178-1
日期:2003.5
A series of acyclic phenethylthiocarbamate derivatives have been synthesized, and their antagonist effect against vanilloid receptor tested. Chain branching led to a significant change in antagonist activity of the parent molecule. Ethyl-branched le showed a 6.3 muM Of IC50 value in Ca-45(2+)-influx assay. (C) 2003 Elsevier Science Ltd. All rights reserved.