Asymmetric Synthesis of α-Substituted β-Amino Ketones from Sulfinimines (<i>N</i>-Sulfinyl Imines). Synthesis of the Indolizidine Alkaloid (−)-223A
作者:Franklin A. Davis、Bin Yang
DOI:10.1021/ja051452k
日期:2005.6.1
carbonyl-LiN(TMS)(2) moiety destabilize the transition state leading to the Z-enolate in the poorly coordinating diethyl ether solvent. This new synthesis of syn-alpha-substituted-beta-amino ketones was applied to the concise enantioselective totalsynthesis of indolizidine (-)-223A, a 5,6,8-trisubstituted alkaloid isolated from the skin of the dendrobatide frog.