Catalytic oxidative carbonylation of arylamines to ureas with W (CO) 6/I2 as catalyst

…, JI Johns, L McElwee??White

Index: Zhang, Li; Darko, Ampofo K.; Johns, Jennifer I.; McElwee-White, Lisa European Journal of Organic Chemistry, 2011 , # 31 p. 6261 - 6268

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Citation Number: 4

Abstract

Abstract The oxidative carbonylation of aniline to N, N′-diphenylurea was carried out by using W (CO) 6 as the catalyst, I 2 as the oxidant, CO as the carbonyl source and 4- (dimethylamino) pyridine (DMAP) as base. The reaction conditions were optimized with respect to different bases, molar ratio of DMAP/iodine, temperature, time, and CO pressure. Various p-substituted arylamines can be converted into the respective symmetrical and ...