Triethylamine → 4-(1-(but-3-enyl)hydrazinyl)-2-chloro-N-(2,6-dichlorophenyl)pyrimidine-5-carboxamide

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Reaction Steps

A solution of 230 mg (2.7 mmol) of 3-butenylhydrazine in 10.5 mL of THF was cooled to 0° C. and treated sequentially with 800 mg (2.4 mmol) of 2,4-dichloro-N-(2,6-dichlorophenyl)pyrimidine-5-carboxamide and 370 μl (2.6 mmol) of triethylamine. The resulting yellow slurry was warmed to room temperature and stirred for 25 h. The reaction mixture was quenched with saturated aqueous ammonium chloride (15 mL) and extracted with CH2Cl2 (3×20 mL). The combined organic layers were dried over Na2SO4, filtered, and the filtrate was purified by chromatography on silica gel (eluens CH2Cl2:MeOH, 99.5:0.5) to give the title compound 85. 1H-NMR (DMSO-d6) δ 3.17 (d, J=5.2 Hz, 2H), 3.31 (s, 2H), 3.80 (t, J=7.3 Hz, 2H), 5.04 (d, J=10.3 Hz, 1H), 5.13 (d, J=17.1 Hz, 1H), 5.77-5.88 (m, 1H), 7.35 (t, J=8.3 Hz, 1H), 7.55 (d, J=8.2 Hz, 2H), 8.15 (s, 1H), 10.19 (s, 1H). Mass Spectrum (ESI) m/e=385.9 (M+1).

Provenance & Evidence