Novel Synthesis of (<i>R</i>)-(+)-γ-Butyrolactone-γ-3-propionates by Fermenting Baker’s Yeast and Enantiomeric Purity Determination Using NMR Technique
作者:Fumio Moriuchi、Hisae Muroi、Hiroshi Aibe
DOI:10.1246/cl.1987.1141
日期:1987.6.5
Optically pure (R)-(+)-γ-butyrolactone-γ-3-propionates 1 were prepared by reducing the precourser, 3-ketoheptane-1,5-dicarboxylic acid mononoesters, with fermenting baker’s yeast. The optical purity (more than 98%) was determined by means of HPLC analysis and NMR determination.
Lipase-catalyzed preparation of optically active .gamma.-butyrolactones in organic solvents
作者:Arie L. Gutman、Kheir Zuobi、Tamar Bravdo
DOI:10.1021/jo00298a031
日期:1990.5
Kharrat, A.; Gardrat, C.; Maillard, B., Canadian Journal of Chemistry, 1985, vol. 63, p. 2522 - 2528
作者:Kharrat, A.、Gardrat, C.、Maillard, B.
DOI:——
日期:——
Titanocene-Catalyzed Reduction of Lactones to Lactols
作者:Xavier Verdaguer、Marcus C. Hansen、Scott C. Berk、Stephen L. Buchwald
DOI:10.1021/jo971560s
日期:1997.11.1
A convenient method for the conversion of lactones to lactols is described. The hydrosilylation to lactols is carried out via air-stable titanocene difluoride or a titanocene diphenoxide precatalyst using inexpensive polymethylhydrosiloxane (PMHS) as the stoichiometric reductant. These procedures have been demonstrated with a variety of substrates and proceed in good to excellent yield.