Stereoselective reductions of N-Boc-hexahydro-1H-indolin-5(6H)-ones
作者:Michael A. Brodney、Marcus L. Cole、Jamie A. Freemont、Stella Kyi、Peter C. Junk、Albert Padwa、Andrew G. Riches、John H. Ryan
DOI:10.1016/j.tetlet.2007.01.078
日期:2007.3
stereoselectivity of reduction of the enamide moiety of N-Boc-hexahydro-1H-indolin-5(6H)-ones. Under ionic reduction conditions (triethylsilane/trifluoroaceticacid) the enamide group of 3a-methyl-N-Boc-hexahydro-1H-indolin-5(6H)-one was reduced to afford exclusively a cis ring-fused product. For the 3a-phenyl substituted analogue more forcing conditions (sodiumcyanoborohydride at pH 2–2.5) were required