Lipase catalysed resolution of (R)- and (S)-1-trimethylsilyl-1-alkyn-3-ols: useful intermediates for the synthesis of optically active γ-lactones
摘要:
Various (R)- and (S)-1-trimethylsilyl-1-alkyn-3-ols, chiral building units useful for the synthesis of biologically active compounds, have been efficiently resolved by enantioselective acetylation mediated by immobilized lipase PS. The resolution is applied to the synthesis of (R)- and (S)-5-octyl-2-(5H)-furanones. (C) 1997, Elsevier Science Ltd. All rights reserved.
ASYMMETRIC ADDITION OF ACETYLIDE TO ALIPHATIC ALDEHYDES—PREPARATION OF OPTICALLY ACTIVE 5-OCTYL-2(5<i>H</i>)-FURANONE—
作者:Teruaki Mukaiyama、Keisuke Suzuki
DOI:10.1246/cl.1980.255
日期:1980.3.5
Various optically active acetylenic alcohols (40-80%e.e.) were obtained by enantioface-differentiatingaddition of lithium trimethylsilylacetylide to aliphatic aldehydes utilizing (2S, 2′S)-2-hydroxymethyl-1-[(1-methylpyrrolidin-2-yl)methyl]pyrrolidine as a chiralligand. Optically active (R)-1-trimethylsilyl-l-undecyn-3-ol (80%e.e.) was transformed into optically active 5-octyl-2(5H)-furanone in good