Sodium ethoxide → 5-(3-benzyloxy-4-methoxy-phenyl)-3-(3-pyrrolidin-1-ylmethyl-phenyl)-1H-[1,2,4]triazole hydrochloride

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Reaction Steps

To a stirred ethanolic suspension of 3-pyrrolidin-1-ylmethyl-benzamidine hydrochloride salt (1:2) (414 mg, 1.5 mmol, 1.5 eq.) in ethanol (15 ml) was added 1.2N NaOEt in ethanol (3.4 ml, 4 eq.) over 3 min. and stirring was then continued for 30 min. at r.t. 3-Benzyloxy-4-methoxy-benzoic acid hydrazide (272 mg, 1 mmol) in ethanol was added at 20° C. and the resulting mixture was heated to reflux for 50 hrs. Upon cooling, the product mixture was filtered, the solvent was evaporated and the residue chromatographed over 20 g SiO2 (Merck 230-400 mesh) with CH2Cl2-MeOH (2M NH3) 96:4 affording a solid. This material was dissolved in ethanol at r.t. and an excess 2N HCl/ether solution (1.0 ml, 2 mmol) was added. After 30 min. the solvent was evaporated and the residue dried under high vacuum at 30° C. overnight affording the title compound (326 mg, 89% yield) as a yellow solid. MS: m/e=441.6 (M+H+)

Provenance & Evidence