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.
β-Diketiminato Nickel Imides in Catalytic Nitrene Transfer to Isocyanides
作者:Stefan Wiese、Mae Joanne B. Aguila、Elzbieta Kogut、Timothy H. Warren
DOI:10.1021/om300909n
日期:2013.4.22
organoazides N3R with isocyanides R′NC. [Me3NN]Ni(CNR)2 (R = tBu, Ar (Ar = 2,6-Me2C6H3)) species provide carbodiimides RN═C═NAr′ upon reaction with Ar′N3 (Ar′ = 3,5-Me2C6H3). Nitrene transfer takes place via the intermediacy of nickel imides. Reaction of [MexNN]Ni(2-picoline) (x = 2 or 3) with Ar′N3 gives the new dinickel imides [MexNN]Ni}2(μ-NAr′) (4 (x = 3) and 5 (x = 2)) as deep purple, diamagnetic
β-二酮亚胺基镍(I)物种[Me 3 NN] Ni(2-picoline)(1)在一系列有机叠氮化物N 3 R的反应中用作碳二亚胺(RN═C═NR')形成的有效催化剂与异氰酸酯R'NC。[Me 3 NN] Ni(CNR)2(R = t Bu,Ar(Ar = 2,6-Me 2 C 6 H 3))物种在与Ar'N 3(Ar ′= 3,5-Me 2 C 6 H 3)。乙二胺的中间发生转移。[Me x NN] Ni(2-picoline)(x= 2或3)和Ar'N 3产生新的二镍酰亚胺[Me x NN] Ni} 2(μ-NAr')(4(x = 3)和5(x = 2))为深紫色,反磁性物质。[Me 2 NN] Ni} 2(μ-NAr')(5)的X射线结构具有短的Ni-N酰亚胺距离,分别为1.747(2)和1.755(2)Å,以及短的Ni-Ni距离2.7210(3)Å。这些二镍酰亚胺4和5与t B
포스파구아니딘 4족 금속 올레핀 중합 촉매
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。
Three-component sequential synthesis of N,N′-disubstituted 5-arylidenedihydropyrimidine-2,4-dione
作者:Maria Cristina Bellucci、Alessandro Volonterio
DOI:10.1016/j.tetlet.2012.06.109
日期:2012.8
A three-component sequential process consisting in (1) in situ formation of carbodiimides by Staudinger reaction, (2) reaction with 2-(bromomethyl)-3-aryl-2-propenoicacids, and (3) final cyclization of the resulting N-acylurea intermediates in order to obtain the synthesis of an array of N,N′-disubstituted 5-arylidenedihydropyrimidine-2,4-dione under mild conditions is presented.