An Efficient Convergent Access to Spiroketal Segment of (+)-Spiroxaline Methyl Ether
作者:Narshinha Argade、Mandeep Singh
DOI:10.1055/s-0030-1258456
日期:2011.4
Starting from trimethylsilylacetylene, a facilesynthesis of optically pure spiroketal unit of (+)-spiroxaline methyl ether has been described. The synthesis entails stepwise alkylation and acylation of an alkyne with two different readily available chiral building blocks followed by the reductive in situ regio- and stereoselective spiroketalization pathway. alkyne - (R)-oxirane - (R)-γ-valerolactone