作者:John Crosby、J. Fraser Stoddart、Xiaoqiang Sun、Mark R. W. Venner
DOI:10.1055/s-1993-25818
日期:——
The stereospecific synthesis of (2R,3R,8R,9R,14R,15R)-2, 3,8,9,14,15-hexaphenyl-1,4,7,10,13,16-hexaoxacyclooctadedecane [(R,R,R,R,R,R)-12] from (R,R)-hydrobenzoin [(R,R)-1] is reported. The ability of (R,R,R,R,R,R)-12 to act as a chiral solid-liquid phase-transfer catalyst in an asymmetric Michael addition is compared with the efficiencies of other chiral di- and tetra-substituted 18-crown-6 derivatives, both with respect to product conversions and chirality transfers from catalysts to products.
(2R,3R,8R,9R,14R,15R)-2,3,8,9,14,15-六苯基-1,4,7,10,13,16-六氧杂环十八烷的立体定向合成[(R,R报道了(R,R)-氢苯偶姻[(R,R)-1]的[(R,R)-氢苯偶姻]的[(R,R,R,R)-12]。 (R,R,R,R,R,R)-12 在不对称迈克尔加成中作为手性固-液相转移催化剂的能力与其他手性二取代和四取代的 18 的效率进行了比较-crown-6衍生物,涉及产物转化和从催化剂到产物的手性转移。