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【结 构 式】

【分子编号】66050

【品名】 

【CA登记号】 

【 分 子 式 】C13H14BrNO2

【 分 子 量 】296.1637

【元素组成】C 52.72% H 4.76% Br 26.98% N 4.73% O 10.8%

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)

Synthesis of intermediate (I):
N-Protection of 2-piperidone (VIII) with PMB-Cl using KOH and TBAB in toluene gives N-PMB-2-piperidone (IX), which is then hydrolyzed with NaOH to afford 5-(4-methoxybenzylamino)pentanoic acid (X). Condensation of amine (X) with 5-bromo-2-fluorobenzaldehyde (XI) by means of Na2CO3 in DMSO/H2O then provides the tertiary amine (XII). Methylation of carboxylic acid (XII) with MeI in the presence of K2CO3 leads to the corresponding methyl ester (XIII), which then undergoes intramolecular cyclization by means of NaOMe and CO(OMe)2 to yield the N-PMB-1-benzazocine derivative (XIV). Debenzylation of compound (XIV) by means of TFA in toluene affords N-unsubstituted benzazocine (XV), which is then reductocondensed with isobutyraldehyde (XVI) by means of NaBH(OAc)3 in CH2Cl2, affording the 1-isobutyl derivative (XVII). Suzuki coupling of the 8-bromo-1-benzazocine derivative (XVII) with 4-(2-butoxyethoxy)phenylboronic acid (XVIII) by means of Pd(PPh3)4 provides adduct (XIX). Finally, hydrolysis of methyl ester (XIX) with NaOH in THF/MeOH gives the target carboxylic acid (I) (3). Scheme 2.

3 Seto, M., Aikawa, K., Miyamoto, N. et al. Highly potent and orally active CCR5 antagonists as Anti-HIV-1 agents: Synthesis and biological activities of 1-benzazocine derivatives containing a sulfoxide moiety. J Med Chem 2006, 49(6): 2037-48.
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) 66037     C28H37NO4 详情 详情
(VIII) 43366 2-piperidinone 675-20-7 C5H9NO 详情 详情
(IX) 66044 1-(p-Methoxybenzyl)-2-piperidinone 128773-73-9 C13H17NO2 详情 详情
(X) 66045 5-[N-(4-methoxybenzyl)amino]pentanoic acid   C13H19NO3 详情 详情
(XI) 66046 5-bromo-2-fluorobenzaldehyde 93777-26-5 C7H4BrFO 详情 详情
(XII) 66047     C20H22BrNO4 详情 详情
(XIII) 66048     C21H24BrNO4 详情 详情
(XIV) 66049     C21H22BrNO3 详情 详情
(XV) 66050     C13H14BrNO2 详情 详情
(XVI) 13226 2-Methylpropanal; Isobutyraldehyde 78-84-2 C4H8O 详情 详情
(XVII) 66051     C17H22BrNO2 详情 详情
(XVIII) 66052     C12H19BO4 详情 详情
(XIX) 66053     C29H39NO4 详情 详情
Extended Information