3,4-Dichlorophenyl isocyanate → 1(3,4-Dichlorophenyl)-3-(1-methyl-2-pyrrolidylidene)urea

Participants

Reaction Steps

A 6.73 g. (0.05 mole) sample of 2-imino-1-methylpyrrolidine HCl is converted to free base in the usual way. To the K2CO3 -dried, benzene extracts are added a pre-filtered solution of 3,4-dichlorophenylisocyanate (9.4 g.; 0.05 mole). Almost immediately there is a separation of product. After stirring for a short time, the product is collected and recrystallized from acetone-methanol-water and finally from acetone-water to give the pure product, 1-(3,4-dichlorophenyl)-3-(1-methyl-2-pyrrolidylidene)urea. m.p. = 160°-161° C.

Provenance & Evidence