The efficient synthesis of carbodiimides using a titanium imido complex
摘要:
An efficient it synthesis of carbodiimides or ureas from the combination of a titanium imido complex 2 and a range of 12 aryl and aliphatic isocyanates is described Control experiments suggest that carbodimide formation is via heterocumulene metathesis through a transient intermediate eta(2)-ureato-N O metallacycle 8 (C) 2010 Elsevier Ltd All rights reserved
Palladium-catalyzed cross-coupling reaction of azides with isocyanides
作者:Zhen Zhang、Zongyang Li、Bin Fu、Zhenhua Zhang
DOI:10.1039/c5cc05981j
日期:——
A palladium-catalyzed cross-coupling reaction of azides with isocyanides is developed, providing a general synthetic route to unsymmetric carbodiimides.
development of new practical and green methods for the synthesis of small heterocycles is an attractive area of research due to the well-known potential of heterocyclic small molecule scaffolds in the drug discovery process. Herein we report a one-pot, three-component sequential procedure for the synthesis of diversely 1,3,5- and 1,3,5,5-substituted hydantoins, in high yields and very mild conditions, using
申请人:DOW GLOBAL TECHNOLOGIES LLC 다우 글로벌 테크놀로지스 엘엘씨(520020158236)
公开号:KR20190060809A
公开(公告)日:2019-06-03
본 구현예는 화학식 I의 포스파구아니딘 금속 착체 및 a-올레핀 중합 시스템에서의 이들 착체의 이용에 관한 것이다.
本实施例涉及化学式I的钴基磷钼酸镍金属配合物及其在α-氧化酶聚合系统中的使用。
Substituent-Controlled Selective Synthesis of <i>N</i>-Acyl 2-Aminothiazoles by Intramolecular Zwitterion-Mediated C–N Bond Cleavage
作者:Yang Wang、Fei Zhao、Yue Chi、Wen-Xiong Zhang、Zhenfeng Xi
DOI:10.1021/jo502123k
日期:2014.11.21
The cleavage of C–N bonds is an interesting and challenging subject in modern organic synthesis. We have achieved the first zwitterion-controlled C–N bondcleavage in the MCR reaction among lithium alkynethiolates, bulky carbodiimides, and acid chlorides to construct N-acyl 2-aminothiazoles. This is a simple, highly efficient, and general method for the preparation of N-acyl 2-aminothiazoles with a
An efficient and straightforward two-step procedure for the synthesis of N-1 alkyl/aryl-substituted hydantoins was developed, starting from easily available starting materials. The procedure envisages a highly regiospecific domino condensation/aza-Michael (nucleophilic substitution)/ON acyl migration between activated α,β-unsaturated carboxylic acids or α-haloaryl acetic acids, respectively, and N-tert-butyl-