反应详情

Similarly, compounds of this invention can be prepared as illustrated by the exemplary reaction in Scheme 2. Reaction of the intermediate 2,4-di(trimethylsiloxy)-5,6,7,8-tetrahydroquinazoline with methyl 5-(bromomethyl)-2-fluorobenzoate in DMF, followed by treatment with 1,4-dioxane and methanol, produced 1-(4-fluoro-3-methoxycarbonylbenzyl)-5,6,7,8-tetrahydroquinazol ine-2,4(1H,3H)-dione. Treatment of the ester with NaOH in water-methanol produced 1-(4-fluoro-3-carboxybenzyl)-5,6,7,8-tetrahydroquinazoline-2,4(1H,3H)-dione. Coupling of the acid with a substituted amine, such as 1-cyclopentylcarbonylpiperazine, in the presence of coupling agents, such as HATU and DIPEA in DMF, produced the targeted compound 1-(4-fluoro-3-(4-(cyclopentylcarbonyl)piperazine-1-carbonyl)benzyl)-5,6,7,8-tetrahydroquinazoline-2,4(1H,3H)-dione.

1. customSimilarly, compounds of this invention can be prepared
2. customas illustrated by the exemplary reaction in Scheme 2