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【结 构 式】

【分子编号】39164

【品名】2-[(1S,4R,5S,6S)-6-[(E,3S)-3-(1-ethoxyethoxy)-1-octenyl]-2-oxabicyclo[2.2.1]hept-5-yl]acetaldehyde

【CA登记号】

【 分 子 式 】C20H34O4

【 分 子 量 】338.48756

【元素组成】C 70.97% H 10.12% O 18.91%

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:(XXVII)

The reduction of ethylene ketal (XXI) with LiAlH4 produces the hydroxymethyl compound (XXII), which by selective tosylation with tosyl chloride yields the tosyloxymethyl compound (XXIII). The cyclization of (XXIII) with NaH in DMF affords the epoxy methane derivative (XXIV), which is deprotected by treatment with piruvic acid (D) in THF to give 2-(3-hydroxy-1-octen-1-yl)-3,5-epoxymethanocyclopentane-1-carboxaldehyde (XXV). The selective protection of the hydroxyl group of (XXV) with ethyl vinyl ether (E) affords the 1-ethoxyethoxy compound (XXVI), which is submitted to homologation in the aldehyde group by treatment with methoxymethylene-triphenylphosphorane (F) and butyllithium in THF, followed by hydrolysis of the non-isolated enol ether with mercuric acetate - water to give the acetaldehyde homolog (XXVII). The Wittig reaction of (XXVII) with 4-carboxybutyltriphenylphosphonium chloride (G) and NaH in DMSO yields 9,11-dideoxy-11alpha,9alpha-epoxymethano-15-(1-ethoxyethoxy)-PGE2 (XXVIII), which is finally deprotected by treatment with acetic acid in THF-water.

1 Trost, B.M.; et al.; An enantioconvergent approach to prostanoids. J Chem Soc Chem Commun 1978, 10, 436-438.
2 Castaner, J.; Owen, R.T.; U-46619. Drugs Fut 1980, 5, 9, 453.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(E) 18762 1-Ethoxyethylene; Ethyl vinyl ether;Ethoxyethene 109-92-2 C4H8O 详情 详情
(D) 24066 2-oxopropionic acid 127-17-3 C3H4O3 详情 详情
(F) 39163 (methoxymethyl)(triphenyl)phosphonium chloride 4009-98-7 C20H20ClOP 详情 详情
(G) 39165 (3-carboxypropyl)(triphenyl)phosphonium chloride C22H22ClO2P 详情 详情
(XXI) 39157 (1R,2R,3R,4S)-3-(1,3-dioxolan-2-yl)-2-[(E,3S)-3-(1-ethoxyethoxy)-1-octenyl]-4-(methoxycarbonyl)cyclopentyl [1,1'-biphenyl]-4-carboxylate C35H46O8 详情 详情
(XXII) 39158 (1R,2R,3S,4S)-3-(1,3-dioxolan-2-yl)-2-[(E,3S)-3-(1-ethoxyethoxy)-1-octenyl]-4-(hydroxymethyl)cyclopentanol C21H38O6 详情 详情
(XXIII) 39159 [(1S,2S,3R,4R)-2-(1,3-dioxolan-2-yl)-3-[(E,3S)-3-(1-ethoxyethoxy)-1-octenyl]-4-hydroxycyclopentyl]methyl 4-methylbenzenesulfonate C28H44O8S 详情 详情
(XXIV) 39160 (1S,2E)-3-[(1S,4R,5S,6R)-5-(1,3-dioxolan-2-yl)-2-oxabicyclo[2.2.1]hept-6-yl]-1-pentyl-2-propenyl 1-ethoxyethyl ether; (1S,4R,5S,6R)-5-(1,3-dioxolan-2-yl)-6-[(E,3S)-3-(1-ethoxyethoxy)-1-octenyl]-2-oxabicyclo[2.2.1]heptane C21H36O5 详情 详情
(XXV) 39161 (1S,4R,5S,6R)-6-[(E,3S)-3-hydroxy-1-octenyl]-2-oxabicyclo[2.2.1]heptane-5-carbaldehyde C15H24O3 详情 详情
(XXVI) 39162 (1S,4R,5S,6R)-6-[(E,3S)-3-(1-ethoxyethoxy)-1-octenyl]-2-oxabicyclo[2.2.1]heptane-5-carbaldehyde C19H32O4 详情 详情
(XXVII) 39164 2-[(1S,4R,5S,6S)-6-[(E,3S)-3-(1-ethoxyethoxy)-1-octenyl]-2-oxabicyclo[2.2.1]hept-5-yl]acetaldehyde C20H34O4 详情 详情
(XXVIII) 39166 (Z)-7-[(1S,4R,5S,6S)-6-[(E,3S)-3-(1-ethoxyethoxy)-1-octenyl]-2-oxabicyclo[2.2.1]hept-5-yl]-5-heptenoic acid C25H42O5 详情 详情
Extended Information