Toluene → HCID 86598735, compound

Participants

Reaction Conditions

Reaction Steps

A round bottom flask was charged with Pd(OAc)2 (84 mg, 0.37 mmol) and rac-BINAP (234 mg, 0.37 mmol) and purged with N2. To the flask was added 4-(5-cyclopropyl-6-chloro-pyrimidin-4-yl)-piperazine-1-carboxylic acid tert-butyl ester (1.27 g, 3.75 mmol), benzophenone imine (815 mg, 4.50 mmol), NaOBut (793 mg, 8.25 mmol) and toluene (24 mL). The mixture was heated to 95° C. for 1 hour. After cooling to room temperature, the reaction was diluted with EtOAc, filtered through Celite, and concentrated. The crude product was purified by column chromatography (hexanes:EtOAc, 2:1) to give 4-[6-(Benzhydrylidene-amino)-5-cyclopropyl-pyrimidin-4-yl]-piperazine-1-carboxylic acid tert-butyl ester (1.62 g, 89%) as a colorless oil. 1H NMR (CDCl3, 400 MHz) δ 8.38 (s, 1H), 7.41 (m, 10H), 3.40 (m, 4H), 3.32 (m, 4H), 1.46 (s, 9H), 0.93 (m, 1H), 0.86 (m, 2H), 0.59 (m, 2H). LCMS (APCI+) m/z 484 [M+H]+; Rt=3.94 min.

Provenance & Evidence