Regioselective rhodium-catalyzed allylic alkylation/ring-closing metathesis approach to carbocycles
作者:P.Andrew Evans、Lawrence J Kennedy
DOI:10.1016/s0040-4039(01)01467-8
日期:2001.10
Treatment of the allylic carbonates 1a–c with the sodium anion of the α-substituted malonates (n=0–2) and Wilkinson's catalyst modified with a triorganophosphite, furnished the allylic alkylation products 2/3a–i in 83–97% yield, favoring 2a–i. The dienes 2a–i were then subjected to ring-closing metathesis using either I or II, to afford the carbocycles 4a–i in 79–99% yield.