Phenyl chloroformate → phenyl 3-tert-butyl-1-(2-chlorophenyl)-1H-pyrazol-5-ylcarbamate

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Reaction Steps

Following the procedure in Example 118A, 3-tert-butyl-1-(2-chlorophenyl)-1H-pyrazol-5-amine (1.30 g, 5.21 mmol) and phenyl chloroformate (2.0 mL, 15.63 mmol) were reacted to give phenyl 3-tert-butyl-1-(2-chlorophenyl)-1H-pyrazol-5-ylcarbamate. 1H NMR (300 MHz, DMSO-d6) δ 10.18 (br s, 1H), 7.67 (d, 1H), 7.55-7.48 (m, 3H), 7.41-7.36 (m, 2H), 7.24 (t, 1H), 7.02 (br s, 2H), 6.31 (s, 1H), 1.23 (s, 9H); LC-MS (ESI) m/z 370 (M+H)+.

Provenance & Evidence