Efficient Synthesis of Enantiomerically Pure ?-Ionone from (R)- and (S)-?-Damascone
作者:Charles Fehr、Olivier Guntern
DOI:10.1002/hlca.19920750405
日期:1992.6.24
(R)- and (S)-α-ionone ((R)- and (S)-1, resp.) were prepared from (R)- and (S)-α-damascone ((R)- and (S)-3, resp.) without racemization in 48% yield employing a new enone transposition. The described transposition is complementary to existing methods whose application is often prohibited by the structural requirements of the substrate. The now easily accessible α-ionones of desired absolute configuration
(R)-和(S)-α-紫罗兰酮((R)-和(S)-1,分别)由(R)-和(S)-α-大马康尼((R)-和(S)-3,分别)在没有外消旋的情况下采用新的烯酮转座以48%的收率。所描述的转置是对现有方法的补充,现有方法的应用通常被基板的结构要求所禁止。现在容易获得的具有所需绝对构型的α-紫罗兰酮可用作萜类化合物合成的手性构件。