作者:Daniel Röme、Martin Johansson、Olov Sterner
DOI:10.1016/j.tetlet.2006.11.122
日期:2007.1
efficient synthetic route to the bicyclic α,β-unsaturated β-keto ester methyl (3aS,7aS)-6-oxo-2,3,3a,6,7,7a-hexahydro-1H-indene-5-carboxylate, a versatile intermediate in the synthesis of biologically active unsaturated 1,4-dialdehydes, is described. The synthesis includes a chirality introducing nonenzymatic asymmetric desymmetrization (ADS) reaction of a cyclic meso-anhydride 4 and a modified Hofmann
一种简单有效的合成双环α,β-不饱和β-酮酯甲基(3a S,7a S)-6-oxo-2,3,3a,6,7,7a-hexahydro-1 H -indene-的方法描述了5-羧酸盐,其是生物活性不饱和1,4-二醛合成中的通用中间体。该合成包括手性引入环状内消旋酸酐4的非酶促不对称脱对称(ADS)反应和用于制备环外二烯的改进的霍夫曼方法。该酯以中等的总收率(19%)从6合成,并具有出色的对映选择性(> 90%)。