申请人:Basf Aktiengesellschaft
公开号:US04544758A1
公开(公告)日:1985-10-01
The invention relates to intermediate compounds having the general formula I ##STR1## in which R.sup.1 is H, an alkyl, arylalkyl or an aliphatic acyl radical, preferably a benzyl or acetyl group and wherein X and Y together span an additional bond between the X and Y carrying C atoms (Ia) or in which Y is OH and X is H (Ib) and in which the dotted line can represent an additional bond particularly [2R,1'Z,3'E,7'E]-6-benzyloxy-2,5,7,8-tetramethyl-2-(4',8',12'-trimethyl-tr ideca-1',3',7'-trien-1'-yl)chroman and 6-benzyloxy-2,5,7,8-tetramethyl-2-(1'-hydroxy-4',8',12'-trimethyl-trideca- 3',7'-diene-1'-yl)chroman, as well as compounds and methods of preparing compounds having the general formula II ##STR2## in which Z is one of the groups ##STR3## wherein R.sup.2 is an alkyl group with 1 to 4 carbon atoms preferably CH.sub.3 or C.sub.2 H.sub.5, particularly (3,7,11-trimethyl-trideca-2,6,10-trien-1-yl)triphenylphosphonium chloride and (3,7,11-trimethyl-trideca-2,6,10-trien-1-yl) phosphoric acid dimethylester as well as methods for the preparation of (2R,4'RS,8'RS)-.alpha.-tocopherol and (all-rac)-.alpha.-tocopherol via the new intermediate product.
本发明涉及具有一般式I的中间化合物:
##STR1##
其中R1为H,烷基,芳基烷基或脂肪族酰基基团,优选为苄基或乙酰基基团,其中X和Y共同跨越X和Y之间的C原子之间的额外键(Ia),或其中Y为OH,X为H(Ib),其中虚线可以表示额外的键,特别是[2R,1'Z,3'E,7'E]-6-苄氧基-2,5,7,8-四甲基-2-(4',8',12'-三甲基十三碳-1',3',7'-三烯-1'-基)色苷和6-苄氧基-2,5,7,8-四甲基-2-(1'-羟基-4',8',12'-三甲基十三碳-3',7'-二烯-1'-基)色苷,以及具有一般式II的化合物和制备这些化合物的方法:
##STR2##
其中Z是以下之一的基团之一:
##STR3##
其中R2是具有1至4个碳原子的烷基,优选为CH3或C2H5,特别是(3,7,11-三甲基十三碳-2,6,10-三烯-1-基)三苯基膦酸盐和(3,7,11-三甲基十三碳-2,6,10-三烯-1-基)磷酸二甲酯,以及通过新的中间产物制备(2R,4'RS,8'RS)-α-生育酚和(all-rac)-α-生育酚的方法。