Methanol → HCID 24855569, compound

Participants

Reaction Steps

Ethoxycarbonyl isothiocyanate (0.5 ml, 4.18 mmol) was added to a solution of 4-[(quinolin-4-ylmethyl)amino]-1H-imidazole-4-carboxamide (0.93 g, crude material from Example 24(a)) dissolved in anhydrous dichloromethane (10 mL) and methanol (5 mL) mixture. After o.n. (over night) at r.t., the solution was concentrated in vacuo and the residue was dissolved in 1N NaOH solution (30 mL) and refluxed for 3.5 h. After cooling to r.t., the pH was adjusted to ˜6.5 with 2 N HCl. The solid that formed was collected by filtration and dried generating 0.35 g of crude material. A portion of the solid (150 mg) was purified by preparative HPLC, and the solid obtained was washed with dichloromethane and ether, generating 25.9 mg (9% yield over two steps) of the title compound.

Provenance & Evidence