【结 构 式】 |
【分子编号】15508 【品名】7-[hydroxy(5-methyl-1-trityl-1H-imidazol-4-yl)methyl]-10-methyl-8,9-dihydropyrido[1,2-a]indol-6(7H)-one 【CA登记号】 |
【 分 子 式 】C37H33N3O2 【 分 子 量 】551.68804 【元素组成】C 80.55% H 6.03% N 7.62% O 5.8% |
合成路线1
该中间体在本合成路线中的序号:(V)A new synthesis of FK-1052 has been described: The cyclization of 2-methylcyclohexane-1,3-dione (I) with phenylhydrazine (II) by means of sulfuric acid in toluene gives 10-methyl-6,7,8,9-tetrahydropyrido[1,2-a]indol-6-one (III), which is condensed with 5-methyl-1-(triphenylmethyl)imidazole-4-carbaldehyde (IV) by means of lithium diisopropylamide (LDA) in THF to yield 7-[hydroxy[5-methyl-1-(triphenylmethyl)imidazol-4-yl]methyl]-10-methyl-6,7,8,9-tetrahydropyrido[1,2-a]indol-6-one (V). The acylation of (V) with acetic anhydride in pyridine affords the corresponding acetate (VI), which by treatment with 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) is converted to the methylene derivative (VII). Finally, this compound is hydrogenated and deprotected by hydrogenolysis with H2 over Pd/C in acetic acid. In order to obtain the (+)-enantiomer, the racemic mixture is treated with (+)-di-p-toluoyl-D-tartaric acid, and the mixture of diastereomeric salts is separated by fractional crystallization. The (+)-enantiomer is obtained by treatment of the corresponding tartrate salt with 2N NaOH. Finally, the (+)-free base is converted to the hydrochloride by treatment with HCl in EtOH and recrystallization from MeOH/ether.
【1】 Ito, K.; Kato, M.; Yamakuni, H.; Nishino, S.; Takasugi, H.; New 5-HT3 (serotonin-3) receptor antagonists. I. Synthesis and structure-activity relationships of pyrido[1,2-a]indoles. Chem Pharm Bull 1994, 42, 12, 2546. |
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) | 15504 | 2-methyl-1,3-cyclohexanedione | 1193-55-1 | C7H10O2 | 详情 | 详情 |
(II) | 11818 | Phenyl hydrazine; 1-Phenylhydrazine | 100-63-0 | C6H8N2 | 详情 | 详情 |
(III) | 15498 | 10-methyl-8,9-dihydropyrido[1,2-a]indol-6(7H)-one | C13H13NO | 详情 | 详情 | |
(IV) | 15499 | 5-methyl-1-trityl-1H-imidazole-4-carbaldehyde | C24H20N2O | 详情 | 详情 | |
(V) | 15508 | 7-[hydroxy(5-methyl-1-trityl-1H-imidazol-4-yl)methyl]-10-methyl-8,9-dihydropyrido[1,2-a]indol-6(7H)-one | C37H33N3O2 | 详情 | 详情 | |
(VI) | 15501 | (10-methyl-6-oxo-6,7,8,9-tetrahydropyrido[1,2-a]indol-7-yl)(5-methyl-1-trityl-1H-imidazol-4-yl)methyl acetate | C39H35N3O3 | 详情 | 详情 | |
(VII) | 15502 | 10-methyl-7-[(E)-(5-methyl-1-trityl-1H-imidazol-4-yl)methylidene]-8,9-dihydropyrido[1,2-a]indol-6(7H)-one | C37H31N3O | 详情 | 详情 |