Platinum complex catalyzed synthesis of urea derivatives from nitroarenes and amines under carbon monoxide
Y Tsuji, R Takeuchi, Y Watanabe
Index: Tsuji, Yasushi; Takeuchi, Ryo; Watanabe, Yoshihisa Journal of Organometallic Chemistry, 1985 , vol. 290, p. 249 - 256
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Abstract
Abstract N, N-Diarylureas were obtained in good yields from nitroarenes and aminoarenes at 140 C under carbon monoxide (initial 60 kg cm− 2) in the presence of a catalytic amount of dichlorobis (triphenylphosphine) platinum (II), the yields of N, N′-diphenylurea, N, N′- bis (4-methylphenyl) urea, and N, N′-bis (4-chlorophenyl) urea were 65, 67 and 61%, respectively. Benzimidazole derivatives were obtained by the intramolecular cyclization ...
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