Abstract

Kinetic resolutions in Lewis acid catalysed asymmetric anti aldol reactions of the boron enolate of imide ( 2) with racemic 2-phenylthio aldehydes ( 3a) – ( 3c) give good yields of anti,anti aldols ( 7). Synthesis of homochiral cyclic ethers ( 4a) – ( 4c) and ( 5a) – ( 5c), and a simple novel route to homochiral lactones ( 6a) – ( 6c) are described.

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