申请人:BASF Aktiengesellschaft
公开号:US04518813A1
公开(公告)日:1985-05-21
(2R,6R)-1-Chloro-2,6,10-trimethyl-undecane I, (R)-(+)-.beta.-chloro-isobutyric acid II, (S)-(+)-1-bromo-3-chloro-2-methylpropane IV and (2R)-(+)-1-chloro-2,6-dimethyl-heptane V are novel optically active units for the synthesis of the side chain of (R,R,R)-.alpha.-tocopherol. In the process according to the invention, the optically active C.sub.14 -chloride I is obtained in 6 simple reaction steps starting from II, via the novel intermediates IV and V, in accordance with the following equation: ##STR1##
(2R,6R)-1-氯-2,6,10-三甲基-十一烷I,(R)-(+)-β-氯异丁酸II,(S)-(+)-1-溴-3-氯-2-甲基丙烷IV和(2R)-(+)-1-氯-2,6-二甲基-庚烷V是(R,R,R)-α-生育酚侧链合成的新型光学活性单元。根据本发明的方法,从II开始,通过新型中间体IV和V,在6个简单的反应步骤中获得光学活性C.sub.14-氯化物I,符合以下方程式:##STR1##