Triethylamine → HCID 59751421, compound

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Reaction Steps

Dissolve the compound of Example 3 (201 mg, 0.38 mmol) in dichloromethane (4 L) and add triethylamine (0.50 mL, 3.5 mmol) followed by methylisocyanate (500 mg, 8.7 mmol). After stirring for 30 minutes, pour the reaction mixture into saturated aqueous sodium bicarbonate and extract with dichloromethane. Dry the organic layer with sodium sulfate, filter and concentrate in vacuo. Chromatograph the residue on a SiO2 column eluting with methanol in dichloromethane (0 to 4%) to give 130 mg of the title compound (60%): mass spectrum (ion spray): m/z=575.3 (M+H) and 518.3 (M−MeNCO).

Provenance & Evidence