Pv. Ramachandran et al., EFFICIENT SYNTHESES OF 2-ISOPINOCAMPHEYL-1,3,2-DIOXABOROLE AND RELATED 2-TERPENYL-1,3,2-DIOXABOROLE FROM 1,2-DICARBONYLS AND 2-HYDROXYKETONES, Tetrahedron letters, 38(14), 1997, pp. 2421-2424
Efficient syntheses of synthetically important chiral 1,3,2-dioxaborol
es have been developed. The reduction of 1,2-dicarbonyls with B-chloro
diisopinocampheylborane, or a reaction of a-hydroxyketones with isopin
ocampheyldichloroborane, provides rapid, convenient syntheses of chira
l enediolboronates of the type, 2-isopinocampheyl-1,3,2-dioxaboroles.
The latter procedure has been utilized to synthesize a series of 2-ter
penyl-1,3,2-dioxaboroles from terpenyldichloroboranes. (C) 1997 Elsevi
er Science Ltd.