4-(Bis(4-fluorophenyl)methylene)piperidine → 3-[5-[4-(Bis(4-fluorophenyl)methylene]piperidin-1-yl]pentyl]thieno[3,4-d]pyrimidine-2,4-dione

Participants

Reaction Steps

The title compound was prepared by the procedure of Example 10 using N-(5-bromopentyl)-N'-(4-carbomethoxythien-3-yl)urea (9.01 g, 26 mmol) and 4-[bis(4-fluorophenyl)methylene]piperidine (14.76 g, 52 mmol). The urea was prepared by reacting methyl 4-aminothiophene-3-carboxylate with one equivalent of 5-bromopentylisocyanate in toluene at room temperature for four hours to produce the urea as a tan solid (98% yield). This material was recrystallized from CH2Cl2 /ether/hexane to afford the urea as a white solid, mp 92°-93.5° C.

Provenance & Evidence