acrolein dialkyl acetals and a divalent titanium reagent (η2-propene)Ti(O-i-Pr)2, react readily with chiral imines 2, prepared from aldehydes and optically active 1-phenylethyl amine, in a regiospecific manner to give optically active syn-1-vinyl-2-amino alcohol derivatives 3 with diastereoselectivity of more than 80% in good yield. By using the adduct 3d thus obtained, statine was formally synthesized
                                    (γ-Alkoxyallyl)titaniums 1,由
丙烯醛二烷基
缩醛和二价
钛试剂(η的反应而产生的2 -
丙烯)的Ti(O-我-Pr)2,与手性
亚胺容易反应2,从醛和光学活性的制备1-苯
乙胺以区域特异性方式以良好的收率得到光学活性的非对映选择性大于80%的合成-
1-乙烯基-2-
氨基醇衍
生物3。通过使用由此获得的加合物3d,正式合成他汀类。