2,5-dimethyl-2,5-hexanediol -Drug Synthesis Database

【结构式】

【分子编号】60245

【品名】2,5-dimethyl-2,5-hexanediol

【CA登记号】

【分子式】C₈H₁₈O₂

【分子量】146.22972

【元素组成】C 65.71% H 12.41% O 21.88%

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)

Treatment of 2,5-dimethyl-2-5-hexanediol (I) with dry hydrogen chloride in EtOH gives rise to the dichloro compound (II). Subsequent Friedel-Crafts condensation of dichloride (II) with toluene (III) in the presence of AlCl3 affords the tetrahydronaphthalene derivative (IV) (1). This is then condensed with mono-methyl terephthalic acid chloride (V) to produce ketone (VI). Wittig reaction of (VI) with methylene triphenylphosphorane leads to olefin (VII). Finally, alkaline hydrolysis of the methyl ester group of (VII) furnishes the target carboxylic acid

参考文献中间体

合成目标

【1】 Zhang, L.; Badea, B.A.; Enyeart, D.; Berger, E.M.; Mais, D.E.; Boehm, M.F.; Syntheses of isotopically labeled 4-[1-(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydro-2-naphthyl)ethenyl]benzoic acid (LGD1069), a potent retinoid X receptor-selective ligand. J Label Compd Radiopharm 1995, 36, 7, 701.
【2】 Boehm, M.F.; Heyman, R.A.; Zhi, L. (Ligand Pharmaceuticals, Inc.); Cpds. having selectivity for retinoid X receptors. EP 0983991; EP 0983992; JP 1996505359; JP 1996505852; JP 1996511027; US 5780676; US 5962731; WO 9321146; WO 9415902 .
【3】 Zhang, L.; Boehm, M.F.; Badea, B.A.; White, S.K.; Mais, D.E.; Berger, E.; Suto, C.M.; Goldman, M.E..; Heyman, R.A.; Synthesis and structure-activity relationships of novel retinoid X receptor-selective retinoids. J Med Chem 1994, 37, 18, 2930.

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)	60245	2,5-dimethyl-2,5-hexanediol		C₈H₁₈O₂	详情	详情
(II)	35216	2,5-dichloro-2,5-dimethylhexane		C₈H₁₆Cl₂	详情	详情
(III)	12890	Toluene	108-88-3	C₇H₈	详情	详情
(IV)	35217	1,1,4,4,6-pentamethyl-1,2,3,4-tetrahydronaphthalene		C₁₅H₂₂	详情	详情
(V)	25029	p-Phthalic acid monomethyl ester chloride; Terephthalic acid monomethyl ester chloride; Methyl 4-chlorocarbonylbenzoate	7377-26-6	C₉H₇ClO₃	详情	详情
(VI)	35218	methyl 4-[(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydro-2-naphthalenyl)carbonyl]benzoate		C₂₄H₂₈O₃	详情	详情
(VII)	60246	methyl 4-[1-(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydro-2-naphthalenyl)ethenyl]benzoate		C₂₅H₃₀O₂	详情	详情

Extended Information