Silver(I)- and Base-Mediated [3 + 3]-Cycloaddition of <i>C</i>,<i>N</i>-Cyclic Azomethine Imines with Aza-oxyallyl Cations
作者:Xiao Cheng、Xia Cao、Jun Xuan、Wen-Jing Xiao
DOI:10.1021/acs.orglett.7b03344
日期:2018.1.5
A silver(I) and base-mediated [3 + 3]-cycloaddition reaction of in situ generated C,N-cyclic azomethine imines with in situ formed aza-oxyallyl cations is reported. This one-pot cycloaddition process shows broad substrate scope an excellent functional group tolerance and provides the corresponding biologically important isoquinoline-fused triazines in good to excellent yields.
Synthesis of pyrazolo[5,1-a]isoquinolines via silver(i)–rhodium(i) cooperative catalysis in the reaction of N′-(2-alkynylbenzylidene)hydrazide with cycloprop-2-ene-1,1-dicarboxylate
作者:Liangqing Yao、Xingxin Yu、Chen Mo、Jie Wu
DOI:10.1039/c2ob26824h
日期:——
A tandemreaction between N′-(2-alkynylbenzylidene)hydrazide and cycloprop-2-ene-1,1-dicarboxylate co-catalyzed by silver triflate and tris(triphenylphosphine)rhodium chloride is reported. The reaction proceeds through 6-endo-cyclization, [3 + 2] cycloaddition, cyclopropane opening, and aromatization, leading to pyrazolo[5,1-a]isoquinolines in moderate to good yields.
N '-(2-炔基亚苄基)酰肼与环丙-2-烯-1,1-二羧酸酯共催化下的串联反应三氟甲磺酸银报道了三(三苯基膦)氯化铑。该反应通过6-内-cyclization,[3 + 2]环加成,环丙烷打开并进行芳构化,导致吡唑并[5,1- a ]异喹啉的产量适中至良好。
One‐pot Sequential Strategy to Prepare Organoselanyl and Organotellanyl Isoquinolinium Imides
作者:Helen A. Goulart、Daniela R. Araujo、Angelita M. Barcellos、Raquel G. Jacob、Eder J. Lenardão、Gelson Perin
DOI:10.1002/ejoc.202201027
日期:2022.11.18
Here report a one-pot two-steps approach to prepareorganoselanyl and organotellanylisoquinoliniumimides by the 6-endo-dig electrophilic cyclization of N′-(2-alkynylbenzylidene)hydrazides using diorganyl diselenides/ditellurides and Oxone® under ultrasound irradiation.