2-(1-Isopropyl-piperidin-4-ylcarbamoyl)-5-(2,2,2-trifluoro-ethoxy)-1H-benzoimidazole-4-carboxylic acid ethyl ester → 1-[5-(5-Chloro-thiophen-2-yl)-isoxazol-3-ylmethyl]-2-(1-isopropyl-piperidin-4-ylcarbamoyl)-5-(2,2,2-trifluoro-ethoxy)-1H-benzoimidazole-4-carboxylic acid

Participants

Reaction Steps

1-[5-(5-Chloro-thiophen-2-yl)-isoxazol-3-ylmethyl]-2-(1-isopropyl-piperidin-4-ylcarbamoyl)-5-(2,2,2-trifluoro-ethoxy)-1H-benzoimidazole-4-carboxylic acid was prepared by a procedure according to example 81 starting from 299.0 mg (0.66 mmol) 2-(1-Isopropyl-piperidin-4-ylcarbamoyl)-5-(2,2,2-trifluoro-ethoxy)-1H-benzoimidazole-4-carboxylic acid ethyl ester and 192.4 mg (0.66 mmol) methanesulfonic acid 5-(5-chloro-thiophen-2-yl)-isoxazol-3-ylmethyl ester. Hydrolysis of the resulting ethyl ester by treatment with LiOH in MeOH and purification by preparative RP-HPLC (CH3CN/H2O gradient+0.05% formic acid) gave the title compound as its formiate in form of a white amorphous solid. Yield: 90 mg MS (ES+): m/e=626, chloro pattern.

Provenance & Evidence