【结 构 式】 |
【分子编号】32229 【品名】(2R,6S)-2,6-dimethylpiperidine; cis-2,6-dimethylpiperidine 【CA登记号】 |
【 分 子 式 】C7H15N 【 分 子 量 】113.20284 【元素组成】C 74.27% H 13.36% N 12.37% |
合成路线1
该中间体在本合成路线中的序号:(IV)The reaction of gamma-chlorobutyrophenone (I) with ethylene glycol (II) by means of p-toluenesulfonic acid in refluxing benzene gives the corresponding ethylene ketal (III), which is condensed with cis-2,6-dimethylpiperidine (IV) by means of Na and heat, and hydrolyzed with concentrated HCl yielding gamma-(cis-2,6-dimethyl-1-piperidyl)butyrophenone (V). Finally, this compound is condensed with 2-bromopyridine (VI) by means of butyllithium in THF.
【1】 Fleming, R.W. (Pfizer Inc.); Antiarrhythmic (+,-)-cis- alpha [3-(2,6-dimethyl-1-piperidinyl)propyl]-alpha-phenyl-2-pyridinemethanols. US 4112103 . |
【2】 Blancafort, P.; Serradell, M.N.; Castaner, J.; Hillier, K.; Pirmenol hydrochloride. Drugs Fut 1981, 6, 4, 234. |
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) | 32227 | gamma-Chlorobutyrophenone; 4-Chloro-1-phenyl-1-butanone | 939-52-6 | C10H11ClO | 详情 | 详情 |
(II) | 11295 | Polyethylene glycol;1,2-Ethanediol;Monoethylene glycol; Ethylene glycol | 107-21-1 | C2H6O2 | 详情 | 详情 |
(III) | 32228 | 2-(3-chloropropyl)-2-phenyl-1,3-dioxolane | C12H15ClO2 | 详情 | 详情 | |
(IV) | 32229 | (2R,6S)-2,6-dimethylpiperidine; cis-2,6-dimethylpiperidine | C7H15N | 详情 | 详情 | |
(V) | 32230 | gamma-(cis-2,6-dimethyl-1-piperidyl)butyrophenone; 4-[(2R,6S)-2,6-dimethylpiperidinyl]-1-phenyl-1-butanone; gamma-(cis-2,6-dimethyl-1-piperidyl)butyrophenone | C17H25NO | 详情 | 详情 | |
(VI) | 29052 | 2-Bromopyridine;α-bromopyridine;α-bromoazine | 109-04-6 | C5H4BrN | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号:(IV)The reaction of dimethylpiperidine (IV) with 3-bromopropanol (VII) in refluxing xylene gives 1-(3-hydroxypropyl)-2,6-cis-dimethylpiperidine (VIII), which by treatment with SOCl2 in refluxing benzene is converted into 1-(3-chloropropyl)-2,6-cis-dimethylpiperidine (IX). Finally, this compound is condensed with 2-benzoylpyridine (X) by means of Li in THF.
【1】 Fleming, R.W. (Pfizer Inc.); Antiarrhythmic (+,-)-cis- alpha [3-(2,6-dimethyl-1-piperidinyl)propyl]-alpha-phenyl-2-pyridinemethanols. US 4112103 . |
【2】 Blancafort, P.; Serradell, M.N.; Castaner, J.; Hillier, K.; Pirmenol hydrochloride. Drugs Fut 1981, 6, 4, 234. |
中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
---|---|---|---|---|---|---|
(IV) | 32229 | (2R,6S)-2,6-dimethylpiperidine; cis-2,6-dimethylpiperidine | C7H15N | 详情 | 详情 | |
(VII) | 12573 | 3-Bromo-1-propanol; 3-Bromopropanol | 627-18-9 | C3H7BrO | 详情 | 详情 |
(VIII) | 32231 | 1-(3-hydroxypropyl)-2,6-cis-dimethylpiperidine; 3-[(2R,6S)-2,6-dimethylpiperidinyl]-1-propanol | C10H21NO | 详情 | 详情 | |
(IX) | 32232 | 1-(3-chloropropyl)-2,6-cis-dimethylpiperidine; (2R,6S)-1-(3-chloropropyl)-2,6-dimethylpiperidine | C10H20ClN | 详情 | 详情 | |
(X) | 32233 | 2-Benzoylpyridine; Phenyl(2-pyridinyl)methanone | 91-02-1 | C12H9NO | 详情 | 详情 |
合成路线3
该中间体在本合成路线中的序号:(IX)Benzyl ester (VII) was prepared by reaction of N-Boc-L-gamma-methylleucine (VI) with benzyl bromide in the presence of Cs2CO3. Subsequent N-Boc group cleavage in (VII) by means of HCl in dioxane furnished gamma-methylleucine benzyl ester (VIII). Amino ester (VIII) was converted into urea (X) by condensation with 2,6-dimethylpiperidine (IX) either in the presence of carbonyl diimidazole or diphosgene. Then, hydrogenolysis of the benzyl ester group of (X) in the presence of Pd/C led to the N-carbamoyl aminoacid (XI). Coupling of amino acid (XI) with dipeptide (V) in the presence of EDC and HOBt gave the tripeptide derivative (XII). The tert-butyl ester group of (XII) was then cleaved under acidic conditions, and the resultant carboxylic acid was finally converted to the corresponding sodium salt by treatment with NaHCO3.
【1】 He, J.X.; et al.; An efficient preparation of the pseudopeptide endothelin-B receptor selective antagonist BQ-788. J Org Chem 1995, 60, 25, 8262. |
【2】 Ishikawa, K.; Fukami, T.; Nagase, T.; Mase, T.; Ihara, M.; Yano, M.; Nishikibe, M. (Banyu Pharmaceutical Co., Ltd.); Endothelin antagonistic substance. EP 0555537; JP 1994107680 . |
中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
---|---|---|---|---|---|---|
(V) | 55973 | methyl 3-((2R)-2-amino-3-{[(1R)-1-(tert-butoxycarbonyl)pentyl]amino}-3-oxopropyl)-1H-indole-1-carboxylate | C23H33N3O5 | 详情 | 详情 | |
(VI) | 55974 | (2S)-2-[(tert-butoxycarbonyl)amino]-4,4-dimethylpentanoic acid | C12H23NO4 | 详情 | 详情 | |
(VII) | 55975 | benzyl (2S)-2-[(tert-butoxycarbonyl)amino]-4,4-dimethylpentanoate | C19H29NO4 | 详情 | 详情 | |
(VIII) | 55976 | benzyl (2S)-2-amino-4,4-dimethylpentanoate | C14H21NO2 | 详情 | 详情 | |
(IX) | 32229 | (2R,6S)-2,6-dimethylpiperidine; cis-2,6-dimethylpiperidine | C7H15N | 详情 | 详情 | |
(X) | 55977 | benzyl (2S)-2-({[(2R,6S)-2,6-dimethylpiperidinyl]carbonyl}amino)-4,4-dimethylpentanoate | C22H34N2O3 | 详情 | 详情 | |
(XI) | 55978 | (2S)-2-({[(2R,6S)-2,6-dimethylpiperidinyl]carbonyl}amino)-4,4-dimethylpentanoic acid | C15H28N2O3 | 详情 | 详情 | |
(XII) | 55979 | methyl 3-((2R)-3-{[(1R)-1-(tert-butoxycarbonyl)pentyl]amino}-2-{[(2S)-2-({[(2R,6S)-2,6-dimethylpiperidinyl]carbonyl}amino)-4,4-dimethylpentanoyl]amino}-3-oxopropyl)-1H-indole-1-carboxylate | C38H59N5O7 | 详情 | 详情 |