Substituted Spiro-Compounds And The Use Thereof For Producing Medicaments
申请人:Frank Robert
公开号:US20090275628A1
公开(公告)日:2009-11-05
The present invention relates to substituted spiro compounds, to processes for preparing them, to medicaments comprising these compounds and to the use of these compounds for producing medicaments.
Oxazolines. XX. Synthesis of achiral and chiral thiiranes and olefins by reaction of carbonyl compounds with 2-(alkylthio)-2-oxazolines
作者:A. I. Meyers、Michael E. Ford
DOI:10.1021/jo00872a015
日期:1976.5
Glyoxylate-Ene Reaction Catalyzed by Ln(OTf)3
作者:Changtao Qian、Taisheng Huang
DOI:10.1016/s0040-4039(97)01536-0
日期:1997.9
Yb(OTf)(3), can catalyze the glyoxylate-ene reaction effectively as a water-stable and reusable catalyst. Moreover, the selectivity of DA product or ene product can be adjusted by solvents in the reaction of glyoxylates with a diene (isoprene). In the presence of chiral ytterbium complexes generated in situ from Yb(OTf)(3) and optical 6,6'-disubstituted binaphthols, methyl glyoxylate smoothly reacts with alpha-methyl styrene to afford alpha-hydroxyl esters in modest optical yields. (C) 1997 Elsevier Science Ltd.
Mousseron; Richaud; Granger, Bulletin de la Societe Chimique de France, 1946, p. 222,224