α-ketene alkyl and α,β-unsaturated acyl radical intermediates in ring constructions
作者:Christopher J Hayes、Gerald Pattenden
DOI:10.1016/0040-4039(95)02147-7
日期:1996.1
Treatment of the E-α,β-unsaturated selenyl esters 1 and 3a with Bu3SnH-AIBN produces the corresponding cyclohexenones 2 and respectively via presumed α-ketenealkylradicalintermediates. In a similar manner the cyclopropyl ester 9 leads to a mixture of 12 and 13, and the 2,7-diene selenyl ester 15 undergoes a novel bi-cyclisation producing the diquinane 17 in 76% yield.