中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 4',7a'-dimethyl-2',3',7',7a'-tetrahydrospiro[[1,3]dioxolane-2,1'-inden]-5'(6'H)-one | 94743-66-5 | C13H18O3 | 222.284 |
—— | 1,1-ethylenedioxy-4,4,7a-trimethyl-2,4,7,7a-tetrahydro-1H-inden-5(6H)-one | 94743-65-4 | C14H20O3 | 236.311 |
—— | 3-<3',3',6',6'-di(ethylenedioxy)-3a'-methylperhydroinden-1'-yl>-1,1,5,5-di(ethylenedioxy)-7a-methyl-2,4,5,6,7,7a-hexahydro-1H-indene | 85573-21-3 | C28H40O8 | 504.621 |
—— | (3'aS,7'aR)-7'a-methylspiro[1,3-dioxolane-2,1'-2,3,3a,4,6,7-hexahydroindene]-5'-one | 93564-75-1 | C12H18O3 | 210.273 |
The reaction of 3-ethenyl-4-methylcyclohex-2-en-1-one (4) with 2-methylcyclopentane-1,3-dione in refluxing toluene containing pyridine gave 6% of 9bξ-hydroxy-3a,6-dimethyl-3a,4,5,6,7,9b-hexahydro-1H-benz[e]indene-3,9(2H,8H)-dione (10). When the same reactants were heated at 100-110� (sealed tube) in benzene containing t-butyl alcohol and diethylamine the main product (61%) was 5',6-dimethylspiro[bicyclo[3.2.1]octane-1,2'-cyclohexane]-3,6',8'-trione (11); the yield of (11) was 72% when the reaction was carried out in the presence of silica gel. Attempts to effect a similar reaction of the dienone (4) with methyl 1β-t-butoxy-7aβ-methyl-5-oxo-1,2,3,3aα,4β,6,7,7a-octahydro-indene-4-carboxylate (21a) gave no conjugate Michael addition product, but (21a) underwent aminolysis to the corresponding diethylamide (21b). Attempts to alkylate the t-butoxy β-keto ester (21a) under various conditions with 7-acetyloxy-7-ethenyl-8 ξ methyl-1,4-dioxaspiro[4,5]decane (41) failed. Similarly, attempts to effect alkylation of the anion of the t-butoxy keto ester (21a) with 7-ethenyl-8-methyl-1,4-dioxaspiro[4,5]dec-6-ene (43) under Lewis acid catalysis were also unsuccessful.