Synthesis of α-Formylated <i>N</i>-Heterocycles and Their 1,1-Diacetates from Inactivated Cyclic Amines Involving an Oxidative Ring Contraction
作者:Fang Wang、Yan He、Miaomiao Tian、Xinying Zhang、Xuesen Fan
DOI:10.1021/acs.orglett.7b04029
日期:2018.2.2
cascade reactions of N-arylpiperidines or N-arylazepanes is presented. Mechanistically, the formation of the title compounds involves an unprecedented oxidative ring contraction of inactivated cyclic amines via Cu(OAc)2/KI/O2-promoted oxidativecleavage and reformation of the C–N bond. Interestingly, when PhI(OAc)2 was used in place of KI, 1,1-diacetates of the corresponding aldehydes were directly obtained
提出了一种由N-芳基哌啶或N-芳基氮杂环庚烷的级联反应合成吡咯烷-2-甲醛或四氢吡啶-2-甲醛的新方法。从机理上讲,标题化合物的形成涉及通过Cu(OAc)2 / KI / O 2促进的氧化裂解和C–N键的重整,使灭活的环状胺发生前所未有的氧化环收缩。有趣的是,当用PhI(OAc)2代替KI时,可以高效地直接获得相应醛的1,1-二乙酸酯。据我们所知,这是区域选择性C(sp 3)–H键功能化和C(sp 3)–使用铜盐和氧使饱和环胺的N键活化。
WO2019210828A5
申请人:——
公开号:WO2019210828A5
公开(公告)日:2022-04-22
BCL-2 INHIBITORS
申请人:BeiGene, Ltd.
公开号:EP3788042A1
公开(公告)日:2021-03-10
Selective synthesis of pyrrolidin-2-ones and 3-iodopyrroles <i>via</i> the ring contraction and deformylative functionalization of piperidine derivatives
作者:Fang Wang、Xinying Zhang、Yan He、Xuesen Fan
DOI:10.1039/c8ob02640h
日期:——
In this paper, a selective synthesis of pyrrolidin-2-ones and 3-iodopyrroles via the cascade reactions of N-substituted piperidines is presented. Mechanistically, the formation of pyrrolidin-2-ones involves a domino process including the in situ formation of pyrrolidine-2-carbaldehyde followed by carboxylic acid formation, decarboxylation and ipso-oxidation. On the other hand, 3-iodopyrroles are believed