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【结 构 式】

【分子编号】49051

【品名】4,4-dimethyltetrahydro-2H-pyran-2-one

【CA登记号】

【 分 子 式 】C7H12O2

【 分 子 量 】128.17108

【元素组成】C 65.6% H 9.44% O 24.97%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:(I)

The reduction of 4,4-dimethyltetrahydropyran-2-one (I) with iBuAlH in THF gives 4,4-dimethyltetrahydropyran-2-ol (II), which is condensed with phosphorane (III) in refluxing acetonitrile to yield the heptenoic ester (IV). The protection of the OH group of (IV) with Tbdms-Cl and imidazole affords the silyl ether (V), which is reduced at the double bond with H2 over Pd/C in ethyl acetate to provide the heptanoate ester (VI). The reduction of the ester group of (VI) with iBu2AlH in THF gives the primary alcohol (VII), which is protected with dihydropyran and PPTS, yielding the tetrahydropyranyl ether (VIII). The desilylation of (VIII) with TBAF in THF affords the heptanol derivative (IX), which by oxidation with tetrapropylammonium perruthenate (TPAP) in dichloromethane is converted into the aldehyde (X). The condensation of (X) with CBr4 and PPh3 in dichloromethane provides the dibromovinyl compound (XI), which is condensed with hexafluoroacetone (XII) by means of BuLi in THF to give the acetylenic alcohol (XIII). The deprotection of (XIII) with pyridinium p-toluenesulfonate (PPTS) in methanol yields the acetylenic diol (XIV), which is selectively reduced with H2 over Pd/C in ethyl acetate to afford the (Z)-ethylenic diol (XV). The oxidation of the primary alcohol of (XV) with pyridinium dichromate in dichloromethane provides the aldehyde (XVI), which is silylated with Tms-Cl, TEA and DMAP in dichloromethane to give the silylated unsaturated aldehyde (XVII).

1 Mohr, P.; Barbier, P.; Pirson, W.; Muller, M.; Bauer, F. (F. Hoffmann-La Roche AG); Cyclohexanediole derivs.. EP 1056716; WO 9943646 .
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(I) 49051 4,4-dimethyltetrahydro-2H-pyran-2-one C7H12O2 详情 详情
(II) 49052 4,4-dimethyltetrahydro-2H-pyran-2-ol C7H14O2 详情 详情
(III) 14182 ethyl 2-(triphenyl-lambda(5)-phosphanylidene)acetate; (Carbethoxymethylene)triphenylphosphorane 1099-45-2 C22H21O2P 详情 详情
(IV) 49053 ethyl (E)-7-hydroxy-5,5-dimethyl-2-heptenoate C11H20O3 详情 详情
(V) 49054 ethyl (E)-7-[[tert-butyl(dimethyl)silyl]oxy]-5,5-dimethyl-2-heptenoate C17H34O3Si 详情 详情
(VI) 49055 ethyl 7-[[tert-butyl(dimethyl)silyl]oxy]-5,5-dimethylheptanoate C17H36O3Si 详情 详情
(VII) 49056 7-[[tert-butyl(dimethyl)silyl]oxy]-5,5-dimethyl-1-heptanol C15H34O2Si 详情 详情
(VIII) 49057 tert-butyl(dimethyl)silyl 3,3-dimethyl-7-(tetrahydro-2H-pyran-2-yloxy)heptyl ether; tert-butyl[[3,3-dimethyl-7-(tetrahydro-2H-pyran-2-yloxy)heptyl]oxy]dimethylsilane C20H42O3Si 详情 详情
(IX) 49058 3,3-dimethyl-7-(tetrahydro-2H-pyran-2-yloxy)-1-heptanol C14H28O3 详情 详情
(X) 49059 3,3-dimethyl-7-(tetrahydro-2H-pyran-2-yloxy)heptanal C14H26O3 详情 详情
(XI) 49060 8,8-dibromo-5,5-dimethyl-7-octenyl tetrahydro-2H-pyran-2-yl ether; 2-[(8,8-dibromo-5,5-dimethyl-7-octenyl)oxy]tetrahydro-2H-pyran C15H26Br2O2 详情 详情
(XII) 44260 1,1,1,3,3,3-hexafluoroacetone 684-16-2 C3F6O 详情 详情
(XIII) 49061 1,1,1-trifluoro-6,6-dimethyl-10-(tetrahydro-2H-pyran-2-yloxy)-2-(trifluoromethyl)-3-decyn-2-ol C18H26F6O3 详情 详情
(XIV) 49062 10,10,10-trifluoro-5,5-dimethyl-9-(trifluoromethyl)-7-decyne-1,9-diol C13H18F6O2 详情 详情
(XV) 49036 (Z)-10,10,10-trifluoro-5,5-dimethyl-9-(trifluoromethyl)-7-decene-1,9-diol C13H20F6O2 详情 详情
(XVI) 49037 (Z)-10,10,10-trifluoro-9-hydroxy-5,5-dimethyl-9-(trifluoromethyl)-7-decenal C13H18F6O2 详情 详情
(XVII) 49063 (Z)-10,10,10-trifluoro-5,5-dimethyl-9-(trifluoromethyl)-9-[(trimethylsilyl)oxy]-7-decenal C16H26F6O2Si 详情 详情
Extended Information