作者:Glenn J. McGarvey、Marshall W. Stepanian
DOI:10.1016/0040-4039(96)01165-3
日期:1996.7
of the title compounds via thermodynamic spirocyclization of a diketodiol 2 is described. Three convergent synthetic approaches to protected derivatives of 2 have been developed, all of which have been converted into a 1.70:1.00 mixture of trans-3:cis-3. A practical consequence of these studies is the availability of the title compounds from dihydropyran and 1,5-pentanediol in 28% and 32% overall yields
描述了经由二酮二醇2的热力学螺环化的标题化合物的第一合成。已开发出三种收敛的合成方法以保护2的衍生物,所有这些方法均已转化为反式-3:顺式-3的1.70:1.00混合物。这些研究的实际结果是,二氢吡喃和1,5-戊二醇的标题化合物的总收率分别为28%和32%。