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【结 构 式】

【分子编号】58931

【品名】3,4,5-trimethoxyphenyl isocyanate; 5-isocyanato-1,2,3-trimethoxybenzene

【CA登记号】

【 分 子 式 】C10H11NO4

【 分 子 量 】209.20168

【元素组成】C 57.41% H 5.3% N 6.7% O 30.59%

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:(XI)

Condensation of 3,4-dichlorobenzyl bromide (I) with triphenylphosphine affords the phosphonium salt (II). The ylide obtained from (II) and butyllithium is then subjected to a Wittig reaction with N-Boc-4-piperidinone (III) to provide the benzylidene piperidine (IV). Catalytic hydrogenation of (IV) over PtO2 gives rise to the corresponding benzylpiperidine (V). After acidic Boc group cleavage in (V), the deprotected piperidine (VI) is coupled with N-Boc-D-valine (VII) in the presence of EDC to furnish amide (VIII). Further N-Boc group cleavage in (VIII) employing trifluoroacetic acid yields amino amide (IX), which is then reduced to diamine (X) by means of borane in THF. Coupling of amine (X) with 3,4,5-trimethoxyphenyl isocyanate (XI) leads to urea (XII). Finally, quaternization of the piperidine N of (XII) with iodomethane provides the title piperidinium salt.

1 Kertesz, D.J.; Smith, D.B.; Hirschfeld, D.R. (F. Hoffmann-La Roche AG); Piperidine CCR-3 receptor antagonists. DE 19955793; EP 1131290; GB 2343894; JP 2002530375; US 6342509; WO 0031033 .
2 Wilhelm, R.S.; Smith, D.B.; Talamas, F.X.; Gong, L.; tesz, D.J. (Syntex (USA) LLC); Cyclic amine derivs.-CCR-3 receptor antagonists. US 6339087 .
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) 42911 4-(bromomethyl)-1,2-dichlorobenzene 18880-04-1 C7H5BrCl2 详情 详情
(II) 58924 (3,4-dichlorobenzyl)(triphenyl)phosphonium bromide C25H20BrCl2P 详情 详情
(III) 18620 tert-butyl 4-oxo-1-piperidinecarboxylate;BOC-Piperidone;N-(tert-Butoxycarbonyl)-4-piperidone; N-Boc-4-piperidone 79099-07-3 C10H17NO3 详情 详情
(IV) 58925 tert-butyl 4-(3,4-dichlorobenzylidene)-1-piperidinecarboxylate C17H21Cl2NO2 详情 详情
(V) 58926 tert-butyl 4-(3,4-dichlorobenzyl)-1-piperidinecarboxylate C17H23Cl2NO2 详情 详情
(VI) 58927 4-(3,4-dichlorobenzyl)piperidine C12H15Cl2N 详情 详情
(VII) 48375 (2R)-2-[(tert-butoxycarbonyl)amino]-3-methylbutyric acid C10H19NO4 详情 详情
(VIII) 58928 tert-butyl (1R)-1-{[4-(3,4-dichlorobenzyl)-1-piperidinyl]carbonyl}-2-methylpropylcarbamate C22H32Cl2N2O3 详情 详情
(IX) 58929 (2R)-2-amino-1-[4-(3,4-dichlorobenzyl)-1-piperidinyl]-3-methyl-1-butanone C17H24Cl2N2O 详情 详情
(X) 58930 (2R)-1-[4-(3,4-dichlorobenzyl)-1-piperidinyl]-3-methyl-2-butanamine; (1R)-1-{[4-(3,4-dichlorobenzyl)-1-piperidinyl]methyl}-2-methylpropylamine C17H26Cl2N2 详情 详情
(XI) 58931 3,4,5-trimethoxyphenyl isocyanate; 5-isocyanato-1,2,3-trimethoxybenzene C10H11NO4 详情 详情
(XII) 58933 7-Octene-1,2-diol C8H16O2 详情 详情
Extended Information