Dimethyl Sulfoxide → 3-[1-(6,7-Dimethoxy-1,2,3-benzotriazin-4-yl)-4-piperidinyl]-1,2,3,4-tetrahydro-1,6-dimethyl-2,4-dioxo-quinazoline

Participants

Reaction Steps

The procedure similar to that described in Example 40 was repeated, except that 354.0 mg (1.0 mmol) of 1,2,3,4-tetrahydro-1,6-dimethyl-2,4-dioxo-3-(4-piperidinyl)-quinazoline hydrobromide (Compound v) obtained in Example 41 was used, 4-methanesulfonyl-6,7-dimethoxy-1,2,3-benzotriazine was used in place of 4-chloro-6,7-dimethoxyquinazoline, DMSO was used as a reaction solvent in place of methanol, and the reaction was conducted at room temperature. As a result, 307.6 mg (yield: 67%) of Compound 75 was obtained as white crystals.

Provenance & Evidence