Water → HCID 15087830, compound

Participants

Reaction Steps

With stirring, 20 g of 1,1-di(methylcarbonyl)-2-(2,3-dichlorophenyl)ethene are added at 0° C. to 65 g of a 23.2% by weight solution of (p-tolylsulfonyl)methyl isocyanide prepared according to Example P1 (a). Then 28.1 g of a 30 % solution of sodium methylate in methanol are added dropwise over 3 hours. The mixture is stirred for 60 minutes at a temperature of +10° C. and then 170 ml of water are added dropwise and the product is subsequently isolated by filtration. The filter residue is recrystallised from a 1:1 mixture of methanol/ethanol and dried under vacuum, affording 8.3 g (50% of theory) of 4-methylcarbonyl-3-(2,3-dichlorophenyl)pyrrole which melts at 192°-194° C.

Provenance & Evidence