N-[2-(pyridinyl)-4-pyrimidinyl]ureas

Details N-[2-(pyridinyl)-4-pyrimidinyl]ureas N-[2-(pyridinyl)-4-pyrimidinyl]ureas

1975-03-07

1977-02-15

Coughlan, Jr., Paul M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2602564B, 424251, C07D23942

Patent

active

040082350

ABSTRACT:
Compounds useful as anti-allergic agents are N-R.sub.3 -N-R.sub.4 -N'-R-N'-(2-Q-5-R.sub.1 -6-R.sub.2 -4-pyrimidinyl)ureas (I), where Q is 4- or 3- or 2-pyridinyl or 4- or 3- or 2-pyridinyl having one or two lower-alkyl substituents or N-oxide thereof, R is hydrogen or lower-alkyl, R.sub.1 is hydrogen, lower-alkyl or cyano, R.sub.2 is hydrogen or lower-alkyl, R.sub.3 is hydrogen, lower-alkyl or lower-hydroxyalkyl, R.sub.4 is hydrogen, lower-alkyl, lower-hydroxyalkyl, lower-alkenyl or lower-cycloalkyl. Said ureas are prepared by reacting 2-Q-4-RNH-5-R.sub.1 -6-R.sub.2 -pyrimidine (II) with a carbamylating agent selected from an R.sub.4 '-isocyanate of the formula R.sub.4 'N=C=O to produce N-R.sub.4 '-N'-R-N'-(2-Q-5-R.sub.1 -6-R.sub.2 -4-pyrimidinyl)urea (IA), an N-R.sub.3 '-N-R.sub.4 '-carbamyl halide of the formula R.sub.3 'R.sub.4 'NC(=O)-halide to produce N-R.sub.3 '-N-R.sub.4 'N'-R-N'-(2-Q-5-R.sub.1 -6-R.sub.2 -4-pyrimidinyl)urea (IB) or 1,1'-carbonyldiimidazole to produce N-(2-Q-5-R.sub.1 -6-R.sub.2 -4-pyrimidinyl)-N-R-imidazole-1-carboxamide and then reacting said 1-carboxamide with R.sub.3 R.sub.4 NH to produce I.

REFERENCES:
patent: 3673184 (1972-06-01), Minami et al.

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