Preparations and Reactions of<i>N</i>-Benzoyl- and<i>N</i>-Ethoxycarbonylcarbodiimides
作者:Oyo Mitsunobu、Masazumi Tomari、Hiroo Morimoto、Toshio Sato、Michio Sudo
DOI:10.1246/bcsj.45.3607
日期:1972.12
The reaction of N-benzoyl-N-t-butylthiourea with either diethyl azodicarboxylate or azodibenzoyl resulted in the formation of benzoyl-t-butylcarbodiimide in 84% and 48% yields, respectively. Dehydrosulfurization of various thioureas was also effected with mercuribenzamide. Benzoyl- or ethoxycarbonylcarbodiimides were obtained in over 80% yields. The reaction of benzoyl-t-butylcarbodiimide with one equivalent each of N-benzoylglycine and glycine ethyl ester led to the formation of N1-benzoyl-N2-t-butyl-N3-(ethoxycarbonyl)methylguanidine in a good yield, no N-benzoylglycylglycine ethyl ester being isolated. When benzoyW-butylcarbodiimide was allowed to react with benzoic acid, dibenzimide and t-butyl isocyanate were formed. Similarly, N-ethoxycarbonylbenzamide and N-benzoylglycine(N′-ethoxycarbonyl)amide were prepared in good yields.
N-苯酰-N-叔丁基硫脲与二乙酰肼二酸酯或苯甲酰二氮杂环反应,分别形成了苯酰-叔丁基氰二甲基脲,产率为84%和48%。不同的硫脲与汞苯酰胺反应也实现了脱硫反应,获得了苯酰氰二甲基脲或乙氧羰基氰二甲基脲,产率均超过80%。苯酰-叔丁基氰二甲基脲与各1当量的N-苯酰甘氨酸和乙酯甘氨酸反应,形成了N1-苯酰-N2-叔丁基-N3-(乙氧羰基)甲基鸟氨酸,产率良好,没有分离到N-苯酰甘氨酸甘氨酸乙酯。当苯酰-叔丁基氰二甲基脲与苯甲酸反应时,形成了二苯并脲和叔丁基异氰酸酯。类似地,N-乙氧羰基苯酰胺和N-苯酰甘氨酸(N′-乙氧羰基)胺也以良好产率制备。