Some common heterocyclic compound, 17325-26-7, name is Methyl 1H-imidazole-5-carboxylate, molecular formula is C5H6N2O2, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route. name: Methyl 1H-imidazole-5-carboxylate
b) 3-(2,2-Dimethyl-indan-1-yl)-3H-imidazole-4-carboxylic acid methyl ester; To a solution of 2,2-dimethyl-indan-1-ol (3.5 g, 21.6 mmol) in THF (160 mL) is added methyl 4-imidazolecarboxylate (CASNo. 17325-26-7, 4.1 g, 32.3 mmol), and triphenylphosphine (9.09 g, 34.5 mmol). The reaction is cooled to 0 0C and diisopropyl azodicarboxylate (6.67 mL, 34.5 mmol) is added. After one hour the reaction is diluted with saturated aqueous NaHCO3 and ethyl acetate. The layers are separated and the organic layer is dried with Na2SO4, filtered, and concentrated. The resulting residue is purified by silica gel flash chromatography (ethyl acetate-dichloromethane, 0:1 to 1 :1) to provide 3-(2,2- dimethyl-indan-1-yl)-3H-imidazole-4-carboxylic acid methyl ester. HRMS: (ESI) m/z 271.1440 [(M+H)+ Calcd for C16H19N2O2: 271.1447]; 1H NMR (400 MHz, CDCI3) delta ppm 2.60 – 3.08 (m, 2 H), 3.92 (s, 3 H), 6.25 (s, 1 H), 7.03 (s, 1 H), 7.15 – 7.46 (m, 4 H), 7.80 (d, J=1.0 Hz, 1 H). The HCI salt of the title compound can be prepared by dissolution in diethyl ether followed by treatment with an excess of 1 N HCI in diethyl ether. The resulting heterogeneous solution is concentrated to furnish the HCI salt of 3-(2,2-dimethyl-indan-1- yl)-3H-imidazole-4-carboxylic acid methyl ester.
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 17325-26-7, its application will become more common.
Reference:
Patent; NOVARTIS AG; WO2008/76336; (2008); A2;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem