Lawesson's reagent → 1-(Pyridazin-3-yl)ethan-1-ol

Participants

Reaction Steps

According to a similar synthesis of compound 4 described in Example 346, compound 1 (500 mg, 1.17 mmol) was alkylated with 1-Bromo-2-methoxy-ethane (180 mg, 1.3 mmol) to give compound 2 (360 mg, 65%) as a white solid. Compound 2 (200 mg, 0.43 mmol) was reacted with Lawesson's Reagent (190 mg, 0.47 mmol) to give compound 3 (84 mg, 50%) as a white solid. And compound 3 (80 mg, 0.17 mmol) was converted to hydantoin 4 (55 mg, 70%) as a white solid.

Provenance & Evidence