(1R)-8-phenylmenthyl glyoxylate (3b) with 1-nitro-1-phenylmethane (4) or with 1-nitro-2-phenylethane (13) led stereoselectively to adducts syn-2b and syn-12b, which were then transformed into the Taxotere side chain and (−)-bestatin hydrochloride in overall yields of 52% and 31%, respectively.
(1所述的硝基醛醇反应- [R)-8-苯基薄荷基
乙醛酸(图3b)与
1-硝基-1-苯基甲烷(4),或与1-硝基-2-苯基
乙烷(13立体选择性地导致加合物)顺式-图2b和顺式12b的,然后分别转化为Taxotere侧链和(-)-bestatin盐酸盐,总收率分别为52%和31%。