First highly stereoselective synthesis of (+)-dihydrosesamin, a trisubstituted tetrahydrofuran-type of lignan, by using highly erythro-selective aldol condensation
作者:Satoshi Yamauchi、Teruhisa Tanaka、Yoshiro Kinoshita
DOI:10.1039/b105419h
日期:——
A 2,3,4-tri-substituted tetrahydrofuran-type lignan, (+)-dihydrosesamin 2, was stereoselectively synthesized by using erythro-selective aldol condensation of the potassium enolate from (3R)-3-(3,4-methylenedioxyphenyl)-4-butanolide 3 with piperonal as a key reaction. This is the first stereoselective synthesis of (+)-dihydrosesamin, which is the enantiomer of the natural product.
采用(3R)-3-(3,4-亚甲基二氧基苯基)烯醇钾的红选择性羟醛缩合立体选择性合成了2,3,4-三取代四氢呋喃型木脂素(+)-二氢芝麻素2。 -4-丁内酯3与胡椒醛的反应是关键反应。这是首次立体选择性合成(+)-二氢芝麻素,它是天然产物的对映体。