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【结 构 式】

【分子编号】57220

【品名】1-(5-bromo-3-pyridinyl)-3-buten-1-ol

【CA登记号】

【 分 子 式 】C9H10BrNO

【 分 子 量 】228.08854

【元素组成】C 47.39% H 4.42% Br 35.03% N 6.14% O 7.01%

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:(V)

The reaction of 5-bromopyridine-3-carboxylic acid (I) with (COCl)2 and CuI in DMF gives the acyl chloride (II), which is reduced with LiAlH(O-tBu)3 in THF to yield the carbaldehyde (III). The allylation of (III) with the organozinc bromide (IV) in THF affords 1-(5-bromo-3-pyridyl)-3-buten-1-ol (V), which is oxidized with DMP in dichloromethane to provide the corresponding ketone (VI). The enantioselective reduction of (VI) with (+)-B-chlorodiisopinocampheyl borane ((+)-DIP-Cl) in ether gives the (R)-enantiomer (VII), which is treated with Ms-Cl and TEA in dichloromethane to yield the mesylate (VIII). The reaction of (VIII) with sodium azide in DMF affords the (S)-azide (IX), which is finally submitted to a reductive cyclization by means of dicyclohexylborane (Cy2BH) in THF to afford the target 3-bromo-5-(2(S)-pyrrolidinyl)pyridine (X) intermediate (see scheme no. 22999801a, intermediate (VI)).

1 Felpin, F.X.; et al.; Enantioselective reduction of heteroaromatic beta,gamma-unsaturated ketones as an alternative to allylboration of aldehydes. Application: Asymmetric synthesis of SIB-1508Y. Tetrahedron 2002, 58, 37, 7381.
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) 17913 5-Bromonicotinic acid 20826-04-4 C6H4BrNO2 详情 详情
(II) 14130 5-Bromonicotinoyl chloride 39620-02-5 C6H3BrClNO 详情 详情
(III) 57218 5-bromonicotinaldehyde C6H4BrNO 详情 详情
(IV) 57219 allyl(bromo)zinc C3H5BrZn 详情 详情
(V) 57220 1-(5-bromo-3-pyridinyl)-3-buten-1-ol C9H10BrNO 详情 详情
(VI) 57221 1-(5-bromo-3-pyridinyl)-3-buten-1-one C9H8BrNO 详情 详情
(VII) 57222 (1R)-1-(5-bromo-3-pyridinyl)-3-buten-1-ol C9H10BrNO 详情 详情
(VIII) 57223 (1R)-1-(5-bromo-3-pyridinyl)-3-butenyl methanesulfonate C10H12BrNO3S 详情 详情
(IX) 57224 3-[(1S)-1-azido-3-butenyl]-5-bromopyridine; (1S)-1-(5-bromo-3-pyridinyl)-3-butenyl azide C9H9BrN4 详情 详情
(X) 57225 3-bromo-5-[(2S)pyrrolidinyl]pyridine C9H11BrN2 详情 详情
Extended Information