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【结 构 式】

【分子编号】68793

【品名】5-bromo-2-methylbenzoic acid;2-Methyl-5-bromobenzoic acid

【CA登记号】79669-49-1

【 分 子 式 】C8H7BrO2

【 分 子 量 】215.04638

【元素组成】C 44.68% H 3.28% Br 37.16% O 14.88%

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:(XVII)

In one method, metalation of 1-bromo-4-fluorobenzene (XI) with Mg in 2-MeTHF at 90 °C gives 4-fluorophenyl magnesium bromide (XII), which then couples with 2-bromothiophene (XIII) in the presence of NiCl2·dppe and AcOH in 2-MeTHF at 22 °C or in the presence of Pd(OAc)2 and DPPP in THF to yield 2-(4-fluorophenyl)thiophene (XIV). Finally, this compound undergoes Friedel–Crafts acylation with 5-iodo-2-methylbenzoic acid (XV) (initially chlorinated with SOCl2 in CH2Cl2) using AlCl3 in CH2Cl2, and subsequent reduction with (Me2SiH)2O in refluxing acetonitrile .
In another method, hydrolysis of methyl 5-bromo-2-methylbenzoate (XVI) with NaOH in MeOH at 50 °C gives rise to the benzoic acid (XVII) , which is then chlorinated with (COCl)2 in the presence of DMF in CH2Cl2 to yield 5-bromo-2-methylbenzoyl chloride (XVIII). Friedel–Crafts reaction of acyl chloride (XVIII) with 2-(4-fluorophenyl) thiophene (XIV) in the presence of AlCl3 in CH2Cl2 affords ketone (XIX), which is then reduced by means of Et3SiH and BF3·Et2O in CH2Cl2/acetonitrile to afford 2-(5-bromo-2-methylbenzoyl)-5-(4-fluorophenyl)thiophene (III) . Finally, compound (III) is iodinated with NaI and CuI in the presence of (MeNHCH2)2 in refluxing toluene/diglyme (IV) .
Alternatively, coupling of 4-fluorophenylboronic acid (XX) with either 2-bromothiophene (XIII) in the presence of PdCl2(PPh3)2 and Na2CO3 in dimethoxyethane at 75-80 °C or with 2-iodothiophene (XXI) in the presence of PdCl2(PPh3)2 at 50 °C affords 2-(4-fluorophenyl) thiophene (XIV) .

1 Abdel-Magid, A.F., Chisholm, M., Mehrman, S. et al. (Janssen Pharmaceutica NV; Mitsubishi Tanabe Pharma Corp.). Process for the preparation of compounds useful as inhibitors of SGLT. CN 101801371, EP 2200606, JP 2010539092, WO 2009035969.
2 Nomura, S., Ueta, K., Kawanishi, E. (Mitsubishi Tanabe Pharma Corp.). Novel compounds having inhibitory activity against sodium-dependant transporter. EP 1651658, JP 2007518683, JP 2008266328, WO 2005012326.
3 Nomura, S., Sakamaki, S., Hongu, M. et al. Discovery of canagliflozin, a novel C-glucoside with thiophene ring, as sodium-dependent glucose cotransporter 2 inhibitor for the treatment of type 2 diabetes mellitus. J Med Chem 2010, 53(17): 6355-60.
4 Filliers, W.F.M., Broeckx, R.L.M., Nieste, P.H.J., Hatsuda, M., Yoshinaga, M., Yada, M. (Janssen Pharmaceutica NV; Mitsubishi Tanabe Pharma Corp.). Process for the preparation of compounds useful as inhibitors of SGLT. US 2010099883, WO 2010043682.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(III) 68782 2-(5-bromo-2-methylbenzyl)-5-(4-fluorophenyl)thiophene 1030825-20-7 C18H14BrFS 详情 详情
(IV) 68783 2-(4-fluorophenyl)-5-(5-iodo-2-methylbenzyl)thiophene 898566-17-1 C18H14FIS 详情 详情
(XI) 29012 1-bromo-4-fluorobenzene 460-00-4 C6H4BrF 详情 详情
(XII) 13643 4-fluorophenyl magnesium bromide;Bromo(4-fluorophenyl)magnesium;bromo(p-fluorophenyl)Magnesium;p-Fluorophenylmagnesium bromide 352-13-6 C6H4BrFMg 详情 详情
(XIII) 13681 2-Bromothiophene 1003-09-4 C4H3BrS 详情 详情
(XIV) 68790 2-(4-fluorophenyl)thiophene 58861-49-7 C10H7FS 详情 详情
(XV) 68791 5-iodo-2-methylbenzoic acid;2-Methyl-5-iodobenzoicacid 54811-38-0 C8H7IO2 详情 详情
(XVI) 68792 methyl 5-bromo-2-methylbenzoate;methyl 5-bromo-o-toluate 79669-50-4 C9H9BrO2 详情 详情
(XVII) 68793 5-bromo-2-methylbenzoic acid;2-Methyl-5-bromobenzoic acid 79669-49-1 C8H7BrO2 详情 详情
(XVIII) 68794 5-bromo-2-methylbenzoyl chloride   C8H6BrClO 详情 详情
(XIX) 68795 (5-bromo-2-methylphenyl)(5-(4-fluorophenyl)thiophen-2-yl)methanone   C18H12BrFOS 详情 详情
(XX) 38403 4-fluorophenylboronic acid 1765-93-1 C6H6BFO2 详情 详情
(XXI) 43394 2-iodothiophene 3437-95-4 C4H3IS 详情 详情
Extended Information