Table 1.

Preparation of optically active homopropargylic allyl alcohols via CBS reduction.

entry	enone (2)	allyl alcohol (3)	yield (%)a	ee (%)b
1	2a	3a	86	87
2	2b	3b	66	89
3	2c	3c	95	91
4	2d	3d	81	91
5	2e	3e	52	89
6	2f	3f	68d	98

^aYields of chromatographically purified products.

^bEnantiomer ratios were determined either by chiral GC or chiral HPLC.

^cAr = 2,6-dimethoxyphenyl.

^dReaction was quenched after 72 h.