Preparation and stereochemical characterization of the diastereoisomeric 1-phenyl-4-t-butylcyclohexene oxides and 1-phenyl-4-t-butylcyclohexane-1,2-diols
作者:G. Berti、B. Macchia、F. Macchia
DOI:10.1016/s0040-4020(01)82481-9
日期:1968.1
cis and trans forms of 1-phenyl-4-t-butylcyclohexene oxide were prepared and their conversion into the corresponding glycols was investigated. Several methods, some of which highly stereospecific, were found for the preparation of all four possible diastereoisomeric glycols 5-8, as shown in Chart I. Dimethyl sulphoxide proved to be a good solvent for the diaxial cleavage of epoxides by alkali, while
制备了1-苯基-4-叔丁基环己烯氧化物的顺式和反式,并研究了它们向相应的二醇中的转化。如图I所示,发现了几种方法,其中一些具有高度立体定向性,可用于制备所有四种可能的非对映异构二醇5-8。在酸性条件下的相同溶剂导致diaxial乙二醇7从反式环氧化物3,并以一个diequatorial 8从顺式环氧化物2。从它们的制备方法,反应和NMR谱图推导出所有暴露物和二醇的相对构型。