Asymmetric Dearomatization of Indoles with Azodicarboxylates via Cascade Electrophilic Amination/Aza-Prins Cyclization/Phenonium-like Rearrangement
作者:Xian-Yun Huang、Pei-Pei Xie、Lei-Ming Zou、Chao Zheng、Shu-Li You
DOI:10.1021/jacs.3c02773
日期:2023.5.31
synthesis of enantioenriched aza-[3.3.1]-bicyclic enamines and ketones, a class of structural cores in many natural products, via asymmetric dearomatization of indoles with azodicarboxylates. The reaction is initiated by electrophilic amination and followed by aza-Prins cyclization/phenonium-like rearrangement. A newly developed fluorine-containing chiral phosphoric acid displays excellent activity in
Studying Regioisomer Formation in the Pd‐Catalyzed Fluorination of Cyclic Vinyl Triflates: Evidence for in situ Ligand Modification**
作者:Yuxuan Ye、Seoung‐Tae Kim、Ryan P. King、Mu‐Hyun Baik、Stephen L. Buchwald
DOI:10.1002/anie.202300109
日期:2023.4.3
A combined experimental and computationalstudy was conducted to investigate the regioisomer formation in the Pd-catalyzed fluorination of cyclic vinyl triflates. Results suggested that the TESCF3 additive unlocked an alternative reaction pathway involving a usual in situ ligand dearomatization. This new mechanism prevented the formation of Pd-cyclohexyne intermediates and significantly increased the
[EN] A CROSS-LINKING MOIETY<br/>[FR] FRACTION DE RÉTICULATION
申请人:UNIV SINGAPORE
公开号:WO2011068482A1
公开(公告)日:2011-06-09
A cross-linkin moiety having a structure represented by formula (I) or (II): Wherein: ArF comprises a fluorinated phenyl group having at least one non-fluorine substituent (R) that is bulkier than fluorine and which is located at the meta position relative to the N3 group; W comprises an electron-withdrawing group; and L comprises a linker group. The cross-linking moiety is particularly useful in the manufacture of polymer semiconductor layers and photovoltaic devices.