中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (-)-(2R)-2-acetyl-8-benzyloxy-2-(t-butyldimethylsilyloxy)-5-methoxy-1,2,3,4-tetrahydronaphthalene | 90744-28-8 | C26H36O4Si | 440.655 |
—— | (-)-(2R)-2-acetyl-8-benzyloxy-5-methoxy-1,2,3,4-tetrahydronaphthalen-1-ol | 81504-96-3 | C20H22O4 | 326.392 |
—— | (-)-(2R,1'S)-8-benzyloxy-2-(1'-hydroxyethyl)-5-methoxy-1,2,3,4-tetrahydronaphthalen-2-ol | 90744-27-7 | C20H24O4 | 328.408 |
The title dienones (2) and (5) were prepared from the chiral alcohols (7a) and (7b) respectively. These key starting materials were in turn available from the reduction of 3-acetyl-5-benzyloxy-8-methoxy-1,2- dihydronaphthalene (6a) and 3-acetyl-8-benzyloxy-5-methoxy-1,2- dihydronaphthalene (6b) with lithium aluminium hydride modified with (—)-N- methylephedrine and N- ethylaniline . Chiral phase high-pressure liquid chromatography was used to analyse the enantioselectivity of these reductions which were shown to yield variable results depending upon the origin of the reducing agent.