中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (RS)-2-(benzo[d][1,3]dioxol-6-yl)-2-{methyl[(4S,5S)-2,2-dimethyl-4-phenyl-1,3-dioxan-5-yl]amino}acetonitrile | 860267-41-0 | C22H24N2O4 | 380.444 |
The asymmetric synthesis of the new lignan cubebin dimethyl ether was accomplished in eight steps with an overall yield of 40 %. In addition, the known lignans (+)-hinokinin and (+)-dihydrocubebin were synthesized by this route. Our approach involves the highly diastereoselective and enantioselective (de ≥ 98%, ee ≥ 98%) construction of a trans-substituted 2,3- dibenzylbutyrolactone through an asymmetric Michael addition of an enantiopure lithiated aminonitrile to 5H-furan-2-one.