The camphor-derived N-acetyloxazolidinethione has been used to effect enantioselective aldol type reactions of the derived 9-BBN enolate with a variety of aldehydes. Mechanistically, the observed facial selectivity is best explained by a boatlike transition structure.
Yan, Tu-Hsin; Hung, An-Wei; Lee, Hui-Chun, Journal of the Chinese Chemical Society, 1995, vol. 42, # 4, p. 691 - 700