Benzothiazines in Synthesis. Further Studies of the Intramolecular, Stereoselective Addition of Sulfonimidoyl Carbanions to α,β-Unsaturated Functional Groups
作者:Michael Harmata、Kanok-on Rayanil、Vinson R. Espejo、Charles L. Barnes
DOI:10.1021/jo900151d
日期:2009.4.17
intramolecular nucleophilic addition of sulfonimidoyl carbanions to form benzothiazines. This reaction generally proceeds with complete stereoselectivity within the limits of our detection. In some cases, benzothiazineformation occurs in a single pot at relatively high temperatures during N-arylation of the simple sulfoximine used in this study. Yet, the process occurs with the same direction and extent
Synthesis of Stable N–H Imines with a Benzo[7,8]indolizine Core and Benzo[7,8]indolizino[1,2-<i>c</i>]quinolines via Copper-Catalyzed Annulation of α,β-Unsaturated <i>O</i>-Acyl Ketoximes with Isoquinolinium <i>N</i>-Ylides
作者:Chun-Bao Miao、Xiao-Qi Qiang、Xiaoli Xu、Xiao-Qing Song、Su-Qing Zhou、Xinyu Lyu、Hai-Tao Yang
DOI:10.1021/acs.orglett.2c01386
日期:2022.6.3
A copper-catalyzed annulation of α,β-unsaturated O-acyl ketoximes with isoquinolinium N-ylides has been developed for the concise synthesis of stable N–H imines with a benzo[7,8]indolizine core. When β-(2-bromoaryl)-α,β-unsaturated O-acyl ketoximes are used as the starting materials, a cascade cyclization occurs to afford the benzo[7,8]indolizino[1,2-c]quinolines.
已经开发了一种铜催化的α,β-不饱和O-酰基酮肟与异喹啉N-叶立德的环化反应,用于简明地合成具有苯并 [7,8] 中氮茚核的稳定 N-H 亚胺。当β-(2-溴芳基) -α,β-不饱和O-酰基酮肟作为起始原料时,发生级联环化反应得到苯并[7,8]中氮茚基[1,2- c ]喹啉。
Tandem Copper(I)‐Catalyzed
<i>N</i>
‐Arylation–1,4‐Conjugate Addition to Access Tetrahydroacridinones
作者:Jyoti M. Honnanayakanavar、Purna Chandra Behera、Surisetti Suresh
DOI:10.1002/adsc.202200877
日期:2022.12.8
copper-catalyzed tandem process integrating N-arylation and 1,4-conjugate addition is disclosed through the reaction of cyclic enaminones and ortho-halochalcones. The reaction appears to proceed through chemoselective arylation on the nitrogen of enaminone with ortho-halochalcones and Michael addition of α-carbon of the enaminone to the chalcone to furnish a diverse range of tricyclic tetrahydroacridinone derivatives