Diastereoselective Synthesis of Optically Active C2-Substituted Spiro(4.5)decanes: Two Key Intermediates for Spirovetivane Sesquiterpenes.
作者:Yoshiji TAKEMOTO、Taiichi OHRA、Yasuhiro YONETOKU、Chuzo IWATA
DOI:10.1248/cpb.45.459
日期:——
We investigated the stereoselective construction of the C2 stereogenic center of the spiro[4.5]decane skeleton present in the spirovetivanes, spirolaurane, and spiroaxanes, and succeeded in synthesizing 2α- and 2β-substituted 6-spiro[4.5]decanones with diastereoselectivity by employing n-Bu3-SnH-mediated spiroannulation of the alkylmercury chloride, and Pd(II)-mediated spiroannulation followed by catalytic hydrogenation of the resulting unsaturated ester, respectively.
我们研究了螺[4.5]癸烷骨架中C2立体中心的立体选择性构建,该骨架存在于螺[4.5]癸烷、螺[4.5]十二烷和螺[4.5]癸烷中,并分别通过n-Bu3-SnH介导的烷基氯化汞的螺环化反应和Pd(II)介导的螺环化反应,以及随后对所得的不饱和酯进行催化氢化,成功合成了具有非对映选择性(2α-和2β-取代)的6-螺[4.5]癸酮。