Asymmetric Organocatalytic One-Pot, Two-Step Sequential Process to Synthesize Chiral Acetal-Containing Polycyclic Derivatives from Cyclic Hemiacetals and Enones
作者:Chao Liu、Yan-Kai Liu
DOI:10.1021/acs.joc.7b01915
日期:2017.10.6
synthesize biologically and synthetically important chiral acetal-containing polycyclic derivatives. This novel protocol had been proved to proceed via Michael-lactolization-oxocarbenium ion ring-closing sequence, which was initiated by a key reactive enamine intermediate and interrupted the previously established reaction pathway of two different enones used in this work, and generated the corresponding
NHC-catalyzed [4 + 2] annulations of allenoates and 2,3-dioxopyrrolidine derivatives
作者:Xue Song、Yangxu Chen、Fangfang Lu、Kai Zhang、Chenxia Yu、Tuanjie Li、Changsheng Yao
DOI:10.1039/d1ob02180j
日期:——
A facile NHC-catalyzed [2 + 4] annulation of allenoates with 2,3-dioxypyrrolidine derivatives was discovered, which paved a new avenue for the construction of highly substituted pyranopyrrole with moderate to good yields, high atom economy and mild reaction conditions.
A silver-catalyzed domino inverse electron-demand oxo-Diels–Alder reaction of 3-cyclopropylideneprop-2-en-1-ones with 2,3-dioxopyrrolidines <i>via</i> cyclobutane-fused furan
作者:Yanshun Zhang、Yin Wei、Min Shi
DOI:10.1039/d1cc00707f
日期:——
silver-catalyzed diastereoselective one-pot domino cyclization-migration/inverse electron-demand oxo-Diels–Alder reaction has been disclosed in this communication through the in situ generated cyclobutane-fused furan intermediate with 4-vinyl-2,3-dioxopyrrolidine for the construction of 2-oxopyrrolidine-fused tricyclic compounds in moderate to good yields with a broad substrate scope under mild conditions
Organocatalytic Asymmetric Inverse‐Electron‐Demand Diels‐Alder Reaction of Pyrrolidone‐Dienes with Enals
作者:Shu‐Xiao Wu、Bo‐Qi Gu、Hui Xu、Xing Zheng、Xiaoyan Luo、Wei‐Ping Deng
DOI:10.1002/adsc.201900664
日期:2019.9.17
A new pyrrolidone‐diene synthon was devised, and the inverse‐electron‐demand Diels‐Alderreaction of pyrrolidone‐dienes with enals catalyzed by chiral secondary amines has been disclosed. A variety of enantioenriched, multifunctionalized hexahydro‐isoindol‐1‐one derivatives were obtained in good yields (up to 75%) with excellent stereoselectivities (up to >20:1 dr and >99% ee).
Au(I)/(<i>R</i>)-BINOL–Ti(IV) Concerted Catalyzed Asymmetric Cascade Cycloaddition Reaction of Arylalkynols
作者:Hongkai Wang、Tianlong Zeng、Weixing Chang、Lingyan Liu、Jing Li
DOI:10.1021/acs.orglett.1c00976
日期:2021.5.7
An efficient catalytic asymmetric cascade cycloadditionreaction of arylalkynols with dioxopyrrolidines was developed. This reaction was achieved using Au(I) and (R)-BINOL–Ti(IV) bimetallic catalysts and exclusively delivered a series of chiral oxo-bridged bicyclic benzooxacine compounds in up to 86% yield with 96% ee as well as >33:1 dr. Meanwhile, three new σ bonds and three new stereogenic centers