Ni-promoted Cyclopentenone Formation by Intramolecular Cyclocarbonylation of 1-Bromo-1,4-dienes
作者:Amadeu Llebaria、Francisco Camps、Josep Ma Moretó
DOI:10.1016/s0040-4020(01)85818-x
日期:1993.2
the formation of 1-bromo-1,4-dienes which were further converted to cyclopentenones through a Ni(CO)4 promoted carbonylation-cyclization process. Four CC bonds are formed by this two step sequence, leading to 2,3-substituted 5-methoxycarbonylmethylcyclopentenones 1. Application of this procedure to 2-butyne affords cyclopentenone 1c, an immediate precursor of the antibiotic methylenomicyn B.