| abstract |
(57) [Summary] [Structure] Formula [I] (In the formula, R 1 is C 1 -C 8 alkyl, C 3 -C 7 cycloalkyl, C 7 -C 11 aralkyl or C 6 -C 10 allyl group is shown, and R 2 is hydrogen atom, C 1 -C 8 alkyl, C 3 -C 7 cycloalkyl or C 7 -C 11 aralkyl group. Also, R 1 and R 2 together form (CH 2 ) n (Wherein n represents 3 or 4) may be formed. Ar is 1-3 halogen atoms, nitro, C 1 -C 6 alkyl, C 3- Optionally substituted with C 7 cycloalkyl, C 2 -C 6 alkenyl, C 2 -C 6 alkynyl, C 7 -C 11 aralkyl, C 6 -C 10 allyl, C 1 -C 6 alkoxy groups or styrene polymer substituents. And optionally a naphthyl group, anthryl group or phenanthryl group. ] The optically active (beta) -amino alkoxy borane complex represented by these. [Effects] The compound of the present invention has a high asymmetric yield and a high syn by reducing a 1,3-dicarbonyl compound by a simple operation. Selectively and optically active 1,3-syn-diol compounds can be synthesized. Furthermore, it is effective for producing optically active alcohol compounds with high asymmetric yield by applying to various carbonyl compounds. |