Optically active beta-aminoalkoxyborane complex and its use in organic synthesis

摘要

PCT No. PCT/JP94/00056 Sec. 371 Date Jul. 19, 1995 Sec. 102(e) Date Jul. 19, 1995 PCT Filed Jan. 17, 1994 PCT Pub. No. WO94/17079 PCT Pub. Date Aug. 4, 1994An optically active beta -aminoalkoxyborane complex of the formula (I): IMAGE (I) wherein R1 is C1-C8 alkyl, C3-C7 cycloalkyl, C7-C11 aralkyl or C6-C10 aryl, R2 is hydrogen, C1-C8 alkyl, C3-C7 cycloalkyl or C7-C11 aralkyl, or R1 and R2 together form (CH2)n wherein n is 3 or 4, and Ar is naphthyl, anthryl or phenanthryl, which may be substituted by from 1 to 3 substituents selected from the group consisting of halogen, nitro, C1-C6 alkyl, C3-C7 cycloalkyl, C2-C6 alkenyl, C2-C6 alkynyl, C7-C11 aralkyl, C6-C10 aryl, C1-C6 alkoxy and styrene polymer substituents.