Revision of stereochemical assignments of (2,2-dimethyl-5-phenyl-[1,3]dioxolan-4-yl)-methanol
作者:Marco Lombardo、Sebastiano Licciulli、Claudio Trombini
DOI:10.1016/j.tetasy.2003.10.026
日期:2004.1
2-dimethyl-5-phenyl-[1,3]dioxolan-4-yl)-methanol. The correct assignment was made by unambiguous synthesis of the title compound via the reaction of (S)-O-TBS-mandelic aldehyde with vinyl magnesium chloride, separation of diastereomeric (1S,2S)- and (1S,2R)-1-phenyl-but-3-ene-1,2-diols, and transformation of (1S,2S)-diol into authentic (4S,5S)-(2,2-dimethyl-5-phenyl-[1,3]dioxolan-4-yl)-methanol.
在文献中报道了(4 S,5 S)-(2,2-二甲基-5-苯基-[1,3]二氧戊环-4-基)-甲醇的比旋转的相反迹象。通过(S)-O -TBS-扁桃醛与乙烯基氯化镁的明确反应合成标题化合物,分离非对映异构体(1 S,2 S)-和(1 S,2 R),进行正确分配-1-苯基-丁-3-烯-1,2-二醇,以及将(1 S,2 S)-二醇转化为纯正的(4 S,5 S)-(2,2-二甲基-5-苯基- [1,3]二氧戊环-4-基)-甲醇。