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【结 构 式】

【分子编号】50525

【品名】2-methyl-4-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-2-naphthalenyl)-3-butyn-2-ol

【CA登记号】

【 分 子 式 】C19H26O

【 分 子 量 】270.41484

【元素组成】C 84.39% H 9.69% O 5.92%

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:(III)

Palladium-catalyzed coupling of 2-bromo-5,5,8,8-tetramethyl-5,6,7,8-tetrahydronaphthalene (I) with 2-methyl-3-butyn-2-ol (II) provided adduct (III). Subsequent cleavage of the propargyl alcohol of (III) with KOH in toluene gave the free acetylene (IV). Lithiation of (IV), followed by quenching with ethyl chloroformate, yielded the aryl propiolic ester (V). Conjugate addition to (V) of the in situ-generated lithium dimethylcuprate gave the Z-crotonate (VI), which was further reduced to the allylic alcohol (VII) using DIBAL. Enantioselective Simmons-Smith cyclopropanation in the presence of (+)-diethyl tartrate produced the cyclopropyl alcohols (VIII) in 80% e.e. favoring the (-)-enantiomer. This mixture was converted to the diastereomeric camphenoate esters, which were separated by preparative chromatography. The desired major isomer (IX) was then hydrolyzed to give the enantiomerically pure alcohol (X), and then oxidized to aldehyde (XI) using N-methylmorpholine-N-oxide and tetrapropylammonium perruthenate.

1 Vuligonda, V.; et al.; Enantioselective syntheses of potent retinoid X receptor ligands: Differential biological activities of individuals antipodes. J Med Chem 2001, 44, 14, 2298.
2 Vuligonda, V.; Chandraratna, R.A. (Allergan, Inc.); 2,4-Pentadienoic acid derivs. having retinoid-like biological activity. EP 0848696; JP 1999507053; US 5675033; WO 9639374 .
3 Chandraratna, R.A.; Vuligonda, V. (Vision Pharmaceuticals, Inc.); 2,4-Pentadienoic acid derivs. having retinoid-like biological activity. WO 9908992 .
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) 43776 6-bromo-1,1,4,4-tetramethyl-1,2,3,4-tetrahydronaphthalene C14H19Br 详情 详情
(II) 17922 2-methyl-3-butyn-2-ol; 3-Methyl butynol 115-19-5 C5H8O 详情 详情
(III) 50525 2-methyl-4-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-2-naphthalenyl)-3-butyn-2-ol C19H26O 详情 详情
(IV) 50526 6-ethynyl-1,1,4,4-tetramethyl-1,2,3,4-tetrahydronaphthalene C16H20 详情 详情
(V) 50527 ethyl 3-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-2-naphthalenyl)-2-propynoate C19H24O2 详情 详情
(VI) 50528 ethyl (Z)-3-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-2-naphthalenyl)-2-butenoate C20H28O2 详情 详情
(VII) 50529 (Z)-3-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-2-naphthalenyl)-2-buten-1-ol C18H26O 详情 详情
(VIII) 50530 [2-methyl-2-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-2-naphthalenyl)cyclopropyl]methanol C19H28O 详情 详情
(IX) 50531 [(1R,2S)-2-methyl-2-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-2-naphthalenyl)cyclopropyl]methyl (1S,4R)-4,7,7-trimethyl-3-oxo-2-oxabicyclo[2.2.1]heptane-1-carboxylate C29H40O4 详情 详情
(X) 50532 [(1R,2S)-2-methyl-2-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-2-naphthalenyl)cyclopropyl]methanol C19H28O 详情 详情
(XI) 50533 (1R,2S)-2-methyl-2-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-2-naphthalenyl)cyclopropanecarbaldehyde C19H26O 详情 详情
Extended Information