Triethylamine → Tert-butyl 4-(isoquinolin-5-ylsulfonyl)-1,4-diazepane-1-carboxylate

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Reaction Steps

To a stirred suspension of isoquinoline-5-sulfonylchloride hydrochloride (3.00 g, 11.4 mmol) in anhydrous methylene chloride (100 mL) was added tert-butyl 1-homopiperazine carboxylate (3.00 g, 15.0 mmol) and triethylamine (4.36 g, 43.1 mmol). The mixture was stirred for 3 h, evaporated to dryness, mixed with a saturated solution of sodium bicarbonate (100 mL) and extracted with ethyl acetate (80 mL×2). The combined extracts were dried, filtered and evaporated to give an oil (4.45 g, 100%). LCMS (+APCI) m/z 392 (M+H).

Provenance & Evidence