Asymmetric synthesis of ()-(+)- and ()-(-)-2,2,4-trimethyl-4-(hydroxymethyl)-1,3-dioxolane of high enantiomeric purity
作者:David Tanner、Peter Somfai
DOI:10.1016/s0040-4020(01)96082-x
日期:1986.1
The title compounds, and ', are readily available in four steps from 2-benzyloxymethyl-2-propen-1-ol, the key step being Sharpless asymmetric epoxidation to give the chiral epoxides or '. The total chemical yield of or ' is 50%, the final products being obtained essentially optically pure. By suitable protecting group manipulation, both title enantiomers can be produced from either of the antipodal
从2-苄氧基甲基-2-丙烯-1-醇可从四个步骤容易地获得标题化合物和',关键步骤是Sharpless不对称环氧化以得到手性环氧化物或'。的总化学收率或'是50%,而得到的最终产物基本上光学纯的。通过适当的保护基操纵,两种标题对映异构体都可以由对映体环氧化物或β中的任何一种产生。