Rhodium carbenoid mediated cyclizations. Intramolecular cyclopropanation and C-H insertion reactions derived from type II o-alkynyl substituted α-diazoacetophenones
作者:Paul H. Mueller、Jamal M. Kassir、Mark A. Semones、M. David Weingarten、Albert Padwa
DOI:10.1016/s0040-4039(00)79330-0
日期:1993.7
The Rh(II) catalyzed reaction of alkynyl substituted diazo ketones gives rise to products derivedfrom migration of the metal to the remote acetylenic carbon atom.
炔基取代的重氮酮的Rh(II)催化反应产生了衍生自金属迁移至较远的炔属碳原子的产物。
Rhodium(II)-Catalyzed Carbocyclization Reaction of α-Diazo Carbonyls with Tethered Unsaturation
作者:Albert Padwa、M. David Weingarten
DOI:10.1021/jo991938h
日期:2000.6.1
cycloalkenone carbenoid. The cyclized carbenoid was found to undergo both aromatic and aliphatic C-H insertion as well as cyclopropanation across a tethered pi-bond. Subjection of diazo phenyl acetic acid 3-phenylprop-2-ynyl ester to Rh(II) catalysis furnished 8-phenyl-1, 8-dihydro-2-oxacyclopenta[a]indenone in high yield. The formation of this compound involves cyclization of the initially formed carbenoid