Chalcogeno Ureas Derived from Bis(1,3-diazepan-2-ylidene)

摘要

A scries of new electron rich olefins(=CNR(CH_2)_4NR)_2,3,(a;R = CH_2C_6H_5,b;R = CH_2C_6H_4-OMe-p,c;R = CH_2C_6H_4-NMe_2-p)was generated via the condensation of RNH(CH_2)_4NHR with Me_2NCH(OMe)_2.The C=C bond cleavage reactions of 3 with S_8 and Se provide a simple and straightforward method for the synthesis of l,3-diazepan-2-chalcogenones 4 and 5,respectively.