N-[(4-methoxyphenyl)methyl]-1,3-thiazol-2-amine → 4-chloro-N,2-bis(4-methoxybenzyl)-1-oxo-N-(thiazol-2-yl)-1,2-dihydroisoquinoline-7-sulfonamide

Participants

Reaction Conditions

Reaction Steps

A round-bottom flask was charged with N-(4-methoxybenzyl)thiazol-2-amine (0.213 g, 0.967 mmol) and THF (4.40 mL), and the vessel was cooled to −78° C. for 15 minutes. LHMDS (1.0 M in THF) (1.055 mL, 1.055 mmol) was then added drop wise over 1 minute. The reaction was stirred for 10 minutes, and then a solution of 4-chloro-2-(4-methoxybenzyl)-1-oxo-1,2-dihydroisoquinoline-7-sulfonyl chloride (0.350 g, 0.879 mmol) in THF (1.60 mL) was added drop wise. The bath was removed, and the resulting mixture was stirred for 45 minutes, until complete conversion to 4-chloro-N,2-bis(4-methoxybenzyl)-1-oxo-N-(thiazol-2-yl)-1,2-dihydroisoquinoline-7-sulfonamide. The reaction was diluted with saturated ammonium chloride (aq.) solution (30 mL), and was washed with ethyl acetate (20 mL×3). The organic layers were combined, dried over magnesium sulfate, filtered and concentrated. The resulting material was purified via silica gel chromatography (ISCO, 40 g), eluting with 0 to 100% ethyl acetate in heptanes to provide 0.250 g of 4-chloro-N,2-bis(4-methoxybenzyl)-1-oxo-N-(thiazol-2-yl)-1,2-dihydroisoquinoline-7-sulfonamide. m/z (ESI) 583.2 (M+H)+.

Provenance & Evidence