Tetrahedron Letters p. 2221 - 2224 (1993)
Update date:2022-08-04
Topics:
Choudhury
Thornton
The Li enolates of α-benzoyloxy and α-methoxymethoxy ketones 1a and 1c afford nonchelation and chelation aldol products, respectively, both with usefully high diastereofacial selectivities. Evidence suggests that transition state chelation of the benzoyl C = O is responsible for the observed 'nonchelation' stereoselectivity of 1a.
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