中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
3-(3-甲氧基苯基)丙酸 | 3-(3-Methoxy-phenyl)-propionic acid | 10516-71-9 | C10H12O3 | 180.203 |
3-(3-甲氧基苯基)丙醛 | 3-(m-methoxyphenyl)propanal | 40138-66-7 | C10H12O2 | 164.204 |
3-(3-甲氧基苯基)丙酸甲酯 | methyl 3-(3-methoxyphenyl)propionate | 50704-52-4 | C11H14O3 | 194.23 |
3-(3-甲氧基苯基)-1-丙醇 | 3-(3-methoxyphenyl)propan-1-ol | 7252-82-6 | C10H14O2 | 166.22 |
Alkylation of ketene methyl trimethylsilyl acetal (10) with 1ξ-acetoxy- 6-methoxy-2-(p- methoxyphenyl )-2-methyl-1,2,3,4-tetrahydronaphthalene (9) in the presence of zinc iodide gave 84% of methyl (1′RS,2′RS)-2- [6′-methoxy-2′-(p-methoxyphenyl )-2?-methyl-1′,2′,3′,4′- tetrahydronaphthalen-1′-yl] ethanoate (11a). Cyclization of the derived acid (11b) with methanesulfonic acid gave 89% of 2,8-dimethoxy-10b-methyl-cis-4b,10b,11,12-tetrahydrochrysen-6(5H)-one (12a), Clemmensen reduction of which afforded 52% of 2,8-dimethoxy-4b-methyl-cis- 4b,5,6,10b,11,12-hexahydrochrysene (12b). Oxidation of (12b) with dichlorodicyanobenzoquinone gave 70% of the conjugated enone (4), which upon hydrogenation over 10% palladium/charcoal gave a 5:1 ratio of 2,8-dimethoxy-10b-methyl-trans-4b,10b,11,12-tetrahydrochrysen-6(5H)-one (14) and the cis isomer (12a). Exhaustive methylation of the trans ketone (14) yielded 49% of 2,8-dimethoxy-5,5,10b-trimethyl-trans-4b,10b,11,12-tetrahydrochrysen-6(5H)-one (16), which upon Clemmensen reduction followed by O- demethylation afforded 5,5,10b-trimethyl-trans-4b,5,6,10b,11,12-hexahydrochrysene-2,8-diol(2).