中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (1S,4aS,10aR)-5-Hydroxy-7-isopropyl-8-methoxy-1,4a-dimethyl-9-oxo-1,2,3,4,4a,9,10,10a-octahydro-phenanthrene-1-carboxylic acid methyl ester | 217174-13-5 | C22H30O5 | 374.477 |
—— | methyl 7-oxo-11,14-dimethoxy-13-isopropylpodocarpate | 74320-55-1 | C23H32O5 | 388.504 |
—— | methyl (7aR,8S,11aS)-2-methoxy-8,11a-dimethyl-6-oxo-3-propan-2-yl-7a,9,10,11-tetrahydro-7H-benzo[d][1]benzoxepine-8-carboxylate | 217174-12-4 | C22H30O5 | 374.477 |
The First total synthesis of enantiopure triptoquinone F (6) starting from podocarpic acid (10) is reported, as well as formal syntheses of enantiopure triptoquinones D (4) and E (5). An acid-promoted Fries rearrangement of a benzannulated lactone (14) has been used as a direct, moderately high yielding route for introduction of C11 functionality. Treatment of methyl 12-methoxypodocarpa-8,11,13-trien-19-oate (11) with t-butylhydroperoxide and a catalytic amount of ruthenium(III) chloride gives a mixture (1 : 1) of diastereomeric t-butylcyclohexadienones (26) and (28).