N,N′,N″-Triacylguanidines and N,N′,N″-tri(alkoxycarbonyl)guanidines were prepared and reduced with borohydride salts in a mixture of tetrahydrofuran and acetic acid to give triacyl and tri(alkoxycarbonyl) orthoamides in yields of 40–85%. However, similar reduction of N,N′,N″-tri(t-butoxycarbonyl)guanidine did not give orthoamide but the aminal di(t-butyl) methylenedicarbamate.

中文翻译：

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通过选择性硼氢化物还原的Orthoamides Ñ，Ñ '，Ñ “-triacyl-和Ñ，Ñ '，Ñ ” -三（烷氧基羰基）-guanidines

Ñ，Ñ '，Ñ “-Triacylguanidines和Ñ，Ñ '，Ñ ” -三（烷氧基羰基）胍的制备和在四氢呋喃和乙酸的混合物中，用硼氢化盐还原，得到三酰基中的产率和三（烷氧基羰基）orthoamides 40–85％。但是，类似的减少Ñ，Ñ '，Ñ “ -三（吨丁氧基羰基）胍没有给orthoamide但缩醛胺二（吨丁基）亚甲基二。