Oxidative Rearrangement of Tertiary Propargylic Alcohols
作者:Arantxa Rodríguez、Wesley Moran
DOI:10.1055/s-0032-1317711
日期:——
An oxidative rearrangement of tertiaryalcohols mediated by m-CPBA is described that generates tetrasubstituted alkenes with a carboxylic acid substituent. The mechanism of the reaction is proposed to proceed through epoxidation of the alkyne to form an oxirene that undergoes a 1,2-aryl shift.
Rhodium(III)-Catalyzed Sequential Cyclization of <i>N</i>-Boc Hydrazones with Propargylic Monofluoroalkynes via C–H Activation/C–F Cleavage for the Synthesis of Spiro[cyclobutane-1,9′-indeno[1,2-<i>a</i>]indenes]
An effective rhodium(III) catalysis for the construction of valuable tetracyclic compounds is described herein. This dominoprocess involving the C–H activation/[3 + 2] annulation/intramolecular Friedel–Crafts reaction sequences of simple and readily available N-Boc hydrazones and propargylic monofluoroalkynes afforded fused tetracyclic spiro[cyclobutane-1,9′-indeno[1,2-a]indenes] in moderate to good