Rh(II)-Catalyzed [2,3]-Sigmatropic Rearrangement of Sulfur Ylides Derived from Cyclopropenes and Sulfides
作者:Hang Zhang、Bo Wang、Heng Yi、Yan Zhang、Jianbo Wang
DOI:10.1021/acs.orglett.5b01542
日期:2015.7.2
Rh2(OAc)4-catalyzed [2,3]-sigmatropicrearrangement of sulfurylides is reported. A series of cyclopropenes were successfully employed for [2,3]-sigmatropicrearrangement by a reaction with either allylic or propargylic sulfides. Under the optimized conditions, the reaction afforded the products in moderate to excellent yields. In these transformations, the vinyl metal carbenes generated in situ from the cyclopropenes
Cobalt-catalyzed multisubstituted allylation of the chelation-assisted C–H bond of (hetero)arenes with cyclopropenes
作者:Kuppan Ramachandran、Pazhamalai Anbarasan
DOI:10.1039/d1sc03476f
日期:——
Cp*CoIII-catalyzed ring-opening isomerization of cyclopropenes to cobalt vinylcarbene has been utilized for the synthesis of multisubstituted allylarenes via directing group-assisted functionalization of C–H bonds of arenes and heteroarenes.
Gold(I)-Catalyzed Addition of Thiols and Thioacids to 3,3-Disubstituted Cyclopropenes
作者:Richard J. Mudd、Paul C. Young、James A. Jordan-Hore、Georgina M. Rosair、Ai-Lan Lee
DOI:10.1021/jo300930c
日期:2012.9.7
Gold(I)-catalyzed reactions of thiols, thiophenols, and thioacids with 3,3-disubstituted cyclopropenes occur in a regioselective and chemoselective manner to produce either vinyl thioethers or primary allylic thioesters in good yields. A survey of commonly used gold(I) catalysts shows Echavarren’s cationic gold(I) catalyst to be most tolerant of deactivation by sulfur. A novel digold with bridging
Rhodium(III)-Catalyzed Transannulation of Cyclopropenes with<i>N</i>-Phenoxyacetamides through CH Activation
作者:Hang Zhang、Kang Wang、Bo Wang、Heng Yi、Fangdong Hu、Changkun Li、Yan Zhang、Jianbo Wang
DOI:10.1002/anie.201408555
日期:2014.11.24
An efficient rhodium(III)‐catalyzed synthesis of 2H‐chromene from N‐phenoxyacetamides and cyclopropenes has been developed. The reaction represents the first example of using cyclopropenes as a three‐carbon unit in rhodium(III)‐catalyzed C(sp2)Hactivations.
Ru(II)-Catalyzed Cross-Coupling of Cyclopropenes with Diazo Compounds: Formation of Olefins from Two Different Carbene Precursors
作者:Bo Wang、Heng Yi、Hang Zhang、Tong Sun、Yan Zhang、Jianbo Wang
DOI:10.1021/acs.joc.7b02634
日期:2018.1.19
convergent method for the synthesis of alkenes. Herein, we report a Ru(II)-catalyzed carbene dimerization of cyclopropenes and diazo compounds. The yields are up to 97% and the stereoselectivity are up to >20:1. Mechanistically, it has been experimentally demonstrated that the catalyst reacts with cyclopropene first to generate a Ru(II)–carbene species, which is attacked by nucleophilic diazo substrate