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【结 构 式】

【分子编号】12439

【品名】(E,4R)-4-[(1R,3aR,7aR)-4-[(E)-2-((3S,5R)-3,5-Bis[[tert-butyl(dimethyl)silyl]oxy]-2-methylenecyclohexylidene)ethylidene]-7a-methyloctahydro-1H-inden-1-yl]-1-cyclopropyl-2-penten-1-one

【CA登记号】

【 分 子 式 】C39H66O3Si2

【 分 子 量 】639.12224

【元素组成】C 73.29% H 10.41% O 7.51% Si 8.79%

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:(XV)

The treatment with NaHCO3 of the corresponding mixture of the 6(R)- and 6(S)-SO2-aldehydic adducts (VIII) gives a mixture of the 20(R) and 20(S) epimeric aldehydes (IX). The Wittig condensation of the aldehyde mixture (IX) with cyclopropylcarbonylmethylenetriphenylphosphorane (X) [prepared from acetylcyclopropane (XI) by bromination to bromoacetylcyclopropane (XII), reaction with triphenylphosphine (XIII) to the phosphonium salt (XIV) and treatment with NaOH] in DMSO at 105 C, followed by chromatographic separation yields the epimeric 20(R)-enone (XV). The reduction of (XV) with NaBH4 and CeCl3 in THF-methanol, followed by chromatographic purification affords the epimeric 3'(R)-allylic alcohol (XVI), which is isomerized by irradiation with UV-light from a TQ 718Z2 Hanau lamp in toluene in the presence of anthracene to give the corresponding 5(Z)-derivative (XVII). Finally, this compound is deprotected by a treatment with tetrabutylammonium fluoride in THF at 60 C.

1 Calverley, M.J.; Synthesis of MC 903, a biologically active vitamin D metabolite analogue. Tetrahedron 1987, 43, 20, 4609-19.
2 Binderup, E.; CALCIPOTRIOL. Drugs Fut 1990, 15, 1, 15.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(VIII) 12432 (2S)-2-[(1R,3aR,7aR)-4-[(E)-((4S,6R)-4,6-bis[[tert-Butyl(dimethyl)silyl]oxy]-2,2-dioxooctahydro-1H-2-benzothiophen-1-yl)methylidene]-7a-methyloctahydro-1H-inden-1-yl]propanal C34H62O5SSi2 详情 详情
(IX) 12433 2-[(1R,3aS,7aR)-4-[(E)-2-((3S,5R)-3,5-bis[[tert-Butyl(dimethyl)silyl]oxy]-2-methylenecyclohexylidene)ethylidene]-7a-methyloctahydro-1H-inden-1-yl]propanal C34H60O3Si2 详情 详情
(X) 12434 1-cyclopropyl-2-(triphenylphosphoranylidene)-1-ethanone C23H21OP 详情 详情
(XI) 12435 Acetylcyclopropane; 1-Cyclopropyl-1-ethanone; Cyclopropylmethylketone 765-43-5 C5H8O 详情 详情
(XII) 12436 2-Bromo-1-cyclopropyl-1-ethanone 69267-75-0 C5H7BrO 详情 详情
(XIII) 12437 Triphenylphosphine; Triphenyl phosphine 603-35-0 C18H15P 详情 详情
(XIV) 12438 (2-Cyclopropyl-2-oxoethyl)(triphenyl)phosphonium bromide 112849-15-7 C23H22BrOP 详情 详情
(XV) 12439 (E,4R)-4-[(1R,3aR,7aR)-4-[(E)-2-((3S,5R)-3,5-Bis[[tert-butyl(dimethyl)silyl]oxy]-2-methylenecyclohexylidene)ethylidene]-7a-methyloctahydro-1H-inden-1-yl]-1-cyclopropyl-2-penten-1-one C39H66O3Si2 详情 详情
(XVI) 12440 (1S,2E,4R)-4-[(1R,3aR,7aR)-4-[(E)-2-((3S,5R)-3,5-Bis[[tert-butyl(dimethyl)silyl]oxy]-2-methylenecyclohexylidene)ethylidene]-7a-methyloctahydro-1H-inden-1-yl]-1-cyclopropyl-2-penten-1-ol C39H68O3Si2 详情 详情
(XVII) 12441 (1S,2E,4R)-4-[(1R,3aR,7aR)-4-[(E)-2-((3S,5R)-3,5-Bis[[tert-butyl(dimethyl)silyl]oxy]-2-methylenecyclohexylidene)ethylidene]-7a-methyloctahydro-1H-inden-1-yl]-1-cyclopropyl-2-penten-1-ol C39H68O3Si2 详情 详情
Extended Information