β-Hydroxy-α-tosyloxy esters as chiral building blocks for the enantioselective synthesis of benzo-annulated oxa-heterocycles: scope and limitations
作者:Sajal Kumar Das、Gautam Panda
DOI:10.1016/j.tet.2008.03.001
日期:2008.5
The enantioselectivesynthesis of benzo-annulated oxa-heterocycles 2,3-dihydrobenzofuran and 1-benzopyran derivatives is described using β-hydroxy-α-tosyloxy esters as chiralbuildingblocks, which are easily accessible through the regioselective α-tosylation of Sharpless asymmetric dihydroxylation-derived syn-2,3-dihydroxy esters.