K. Chibale et S. Warren, KINETIC RESOLUTIONS IN ANTIALDOL REACTIONS - ASYMMETRIC-SYNTHESIS OF HETEROCYCLES WITH PHENYLTHIO MIGRATION, Phosphorus, sulfur and silicon and the related elements, 74(1-4), 1993, pp. 401-402
Kinetic resolutions in Lewis acid catalysed asymmetric anti aldol reac
tions of the boron enolate of imide (2) with racemic 2-phenylthio alde
hydes (3) give good Yields of Felkin anti,anti aldols (6). The synthes
is of homochiral cyclic ethers (4) and a simple novel route to homochi
ral lactones (5) are described.