Nitrogen → N-{[2-(cyclopropylethynyl)-1,3-thiazol-4-yl]methoxy}-1-(5-methyl-1H-tetrazol-1-yl)-1-phenylmethanimine

Participants

Reaction Steps

To a stirred solution of N-[(2-bromo-1,3-thiazol-4-yl)methoxy]-1-(5-methyl-1H-tetrazol-1-yl)-1-phenylmethanimine (0.2 g, 0.527 mmol, 1 eq.) in 3 ml dry THF “degassed” with N2, was added cyclopropylacetylene (0.069 g, 1.05 mmol, 2 eq.) followed by triethylamine (0.213 g, 2.1 mmol, 4 eq.), Copper Iodide (0.015 g, 0.079 mmol, 0.15 eq.) and Tetrakis(triphenylphosphine)palladium (0.030 g, 0.026 mmol, 0.05 eq.). The reaction was stirred for 20 hrs at room temperature for complete conversion. The reaction was diluted with EtOAc (50 ml), filtered through “Chem Elut” cartridge, washed with fresh EtOAc (2×20 ml) and the filtrate was concentrated. The residue was chromatographed on silica gel to give N-{[2-(cyclopropylethynyl)-1,3-thiazol-4-yl]methoxy}-1-(5-methyl-1H-tetrazol-1-yl)-1-phenylmethanimine (0.108 g, 56% yield) as a brown gum.

Provenance & Evidence