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【结 构 式】

【分子编号】26009

【品名】ethyl 1-phenyl-3,4-dihydro-2(1H)-isoquinolinecarboxylate

【CA登记号】

【 分 子 式 】C18H19NO2

【 分 子 量 】281.3544

【元素组成】C 76.84% H 6.81% N 4.98% O 11.37%

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:(VI)

YM-905 has been obtained by two related ways: 1) The benzoylation of 2-phenylethylamine (I) with benzoyl chloride (II) and triethylamine in chloroform, or with benzoic acid (III), DPPA and triethylamine in DMF, gives the corresponding benzamide (IV), which is cyclized by means of POCl3 and P2O5 in refluxing xylene and reduced with NaBH4 in ethanol, yielding racemic 1-phenyl-1,2,3,4-tetrahydroisoquinoline (V). The reaction of (V) with ethyl chloroformate by means of K2CO3 in chloroform affords racemic 1-phenyl-1,2,3,4-tetrahydroisoquinoline-2-carboxylic acid ethyl ester (VI), which is transesterified with quinuclidine-3(R)-ol (VII) by means of NaH in refluxing toluene to provide the quinuclidinyl ester (VIII) as a diastereomeric mixture. This mixture is resolved by chiral HPLC, giving the target compound as a pure enantiomer. 2) The racemic 1-phenyl-1,2,3,4-tetrahydroisoquinoline (V) can also be submitted to optical resolution with (+)-tartaric acid to give 1(S)-phenyl-1,2,3,4-tetrahydroisoquinoline (IX), which is condensed with ethyl chloroformate by means of K2CO3 in chloroform to afford 1(S)-phenyl-1,2,3,4-tetrahydroisoquinoline-2-carboxylic acid ethyl ester (VI). This compound is transesterified with quinuclidine-3(R)-ol (VII) by means of NaH in refluxing toluene to directly provide the pure enantiomer.

1 Mealy, N.; Castañer, J.; YM-905. Drugs Fut 1999, 24, 8, 871.
2 Takeuchi, M.; Naito, R.; Hayakawa, M.; Okamoto, Y.; Yonetoku, Y.; Ikeda, K.; Isomura, Y. (Yamanouchi Pharmaceutical Co., Ltd.); Novel quinuclidine derivs. and medicinal compsn. thereof. EP 0801067; US 6017927; WO 9620194 .
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) 18333 Phenethylamine; 2-Phenyl-1-ethanamine 64-04-0 C8H11N 详情 详情
(II) 10463 Benzoyl chloride 98-88-4 C7H5ClO 详情 详情
(III) 10202 Benzoic acid 65-85-0 C7H6O2 详情 详情
(IV) 26007 N-phenethylbenzamide C15H15NO 详情 详情
(V) 26008 1-phenyl-1,2,3,4-tetrahydroisoquinoline C15H15N 详情 详情
(VI) 26009 ethyl 1-phenyl-3,4-dihydro-2(1H)-isoquinolinecarboxylate C18H19NO2 详情 详情
(VII) 16152 (3R)-1-azabicyclo[2.2.2]octan-3-ol; (R)-(-)-Quinuclidinol 42437-96-7 C7H13NO 详情 详情
(VIII) 26010 (3R)-1-azabicyclo[2.2.2]oct-3-yl 1-phenyl-3,4-dihydro-2(1H)-isoquinolinecarboxylate C23H26N2O2 详情 详情
(IX) 26011 (1S)-1-phenyl-1,2,3,4-tetrahydroisoquinoline C15H15N 详情 详情
(X) 26012 ethyl (1S)-1-phenyl-3,4-dihydro-2(1H)-isoquinolinecarboxylate C18H19NO2 详情 详情
Extended Information