Silver Triflate-Catalyzed or Electrophile-Mediated Tandem Reaction of<i>N′</i>-(2-Alkynylbenzylidene)hydrazides with Dimethyl Acetylenedicarboxylate
作者:Zhiyuan Chen、Qiuping Ding、Xingxin Yu、Jie Wu
DOI:10.1002/adsc.200900131
日期:2009.7
Different outcomes were generated under different conditions for the tandem reactions of N′‐(2‐alkynylbenzylidene)hydrazides with dimethyl acetylenedicarboxylate (DMAD) catalyzed by silver triflate or in the presence of electrophiles. The unexpected isoquinoline‐based azomethine ylides were obtained when the reaction was catalyzed by silver triflate or in the presence of bromine, while the fused 1
Multicatalytic tandem reaction of N′-(2-alkynylbenzylidene)hydrazide with indole
作者:Xingxin Yu、Xiaodi Yang、Jie Wu
DOI:10.1039/b913409c
日期:——
The combination of AgOTf and Dy(OTf)3 shows high efficiency as a catalyst in the tandemreactions of N′-(2-alkynylbenzylidene)hydrazides with indoles, which generate the unexpected 1-(indol-3-yl)-2-aminoisoquinolinium triflates in good yields.
A [3 + 2] cycloaddition of C,N-cyclicazomethineimine with in situ-generated CF3CN for the construction of 2-(trifluoromethyl)-[1,2,4]triazolo[5,1-a]isoquinoline is reported. Remarkably, this process shows a broad substrate scope with excellent functional group tolerance, which is scalable and enables a practical route to a library of 2-(trifluoromethyl)-[1,2,4]triazolo[5,1-a]isoquinoline derivatives
C , N-环状偶氮甲碱亚胺与原位生成的 CF 3 CN 进行 [3 + 2] 环加成,用于构建 2-(三氟甲基)-[1,2,4]三唑并[5,1- a ]异喹啉:报道称。值得注意的是,该过程显示出广泛的底物范围和出色的官能团耐受性,可扩展并为构建 2-(三氟甲基)-[1,2,4]三唑并[5,1- a ]异喹啉衍生物库提供了一条实用途径中等至良好的产量。
Lewis acid-catalyzed reactions of N′-(2-alkynylbenzylidene)hydrazides with diethyl phosphite
作者:Xingxin Yu、Qiuping Ding、Zhiyuan Chen、Jie Wu
DOI:10.1016/j.tetlet.2009.05.013
日期:2009.7
Lewis acid catalyst-tuned reactions of N'-(2-alkynylbenzylidene)hydrazides with diethyl phosphite are described. Isoquinolin-1-ylphosphonate is generated when copper triflate is utilized as catalyst, while 2-amino-1,2-dihydroisoquinolin-1-ylphosphonate is obtained in the presence of palladium acetate. (C) 2009 Elsevier Ltd. All rights reserved.