Catalytic Electrophilic Thiocarbocyclization of Allenes
作者:Quanbin Jiang、Huimin Li、Xiaodan Zhao
DOI:10.1021/acs.orglett.1c03270
日期:2021.11.19
An efficient approach via catalytic electrophilic thiocarbocyclization of allenes to construct indene-based sulfides with excellent regioselectivities is disclosed. The reactions were carried out at low temperatures by selenide catalysis in the presence of TMSOTf. Not only electrophilic arylthio reagents but also electrophilic alkylthio reagents worked well under these conditions. Furthermore, the
Cumulene photochemistry: photorearrangments of tetraphenyl and triphenyl C3 isomers
作者:Michael W. Klett、Richard P. Johnson
DOI:10.1021/ja00299a036
日期:1985.6
Photoreactions dans des solvants aprotiques du tetraphenylallene, du triphenylallene, des triphenyl-1,2,3- et -1,3,3-cyclopropenes. Description des isomeres de l'indene diversement substitues figurant parmi les photoproduits. Mecanisme
光反应 dans des solvants aprotiques du tetraphenylallene, du triphenylallen, des triphenyl-1,2,3- et -1,3,3-cyclopropenes。描述 des isomeres de l'indene 多样性替代 figurant parmi les photoproduits。机制
Gold-catalyzed oxidation of arylallenes: Synthesis of quinoxalines and benzimidazoles
A gold-catalyzedoxidation of arylallenes to form alpha-diketones and aldehydes in good yields is presented. Further directed synthesis of quinoxalines and benzimidazoles, via the condensation of the resulting alpha-diketones and aldehydes with benzene-1,2-diamine, was achieved in high yields.
Gold-catalyzed intermolecular hydroamination of allenes with sulfonamides
作者:Chen Zhang、Shao-Qiao Zhang、Hua-Jun Cai、Dong-Mei Cui
DOI:10.3762/bjoc.9.117
日期:——
A co-catalyst of (PPh3)AuCl/AgOTf for the intermolecularhydroamination of allenes with sulfonamides is shown. The reaction proceeded smoothly under mild conditions for differently substituted allenes giving N-allylic sulfonamides in good yields with high regioselectivity and E-selectivity.
Coupling of N-Tosylhydrazones with Terminal Alkynes Catalyzed by Copper(I): Synthesis of Trisubstituted Allenes
作者:Qing Xiao、Ying Xia、Huan Li、Yan Zhang、Jianbo Wang
DOI:10.1002/anie.201005741
日期:2011.2.1
The easy way to allenes: An operationally simple reaction under mild conditions has led to the direct formation of trisubstituted allenes (see scheme; Ts=4‐toluenesulfonyl). An unprecedented copper–carbene migratory insertion process seems to take place, in contrast to classic copper(I)‐catalyzed reactions of diazo compounds.