<i>N</i>-Sulfonyl acetylketenimine as a highly reactive intermediate for the synthesis of <i>N</i>-sulfonyl amidines
作者:Weiguang Yang、Dayun Huang、Xiaobao Zeng、Dongping Luo、Xinyan Wang、Yuefei Hu
DOI:10.1039/c8cc04699a
日期:——
A highly reactive intermediate N-sulfonyl acetylketenimine was generated from a 3-butyn-2-one participating CuAAC/ring-opening method. Its high reactivity due to bearing two EWGs allowed us to offer the first example of a reaction between ketenimine and amide to synthesize N-sulfonyl amidines efficiently.
An efficient synthesis of sulfonylguanidines via reaction of tetra-substituted urines with ArSO2NCO has been developed with good yields, which provides a convenient way for synthesis of sulfonyl group protected guanidine from urine in one step.
The synthesis of sulfonylguanidines from N,N,N',N'-tetramethylthiourea and sulfonyl azides is described. This method serves as an alternative route for generating sulfonylguanidines via the use of stable starting materials.
Synthesis of Guanidine Derivatives and Molecular Recognition
作者:Yanxing Qi、Haixiang Gao、Min Yang、Chun-Gu Xia、Jishuan Suo
DOI:10.1081/scc-120017128
日期:2003.1.5
Five Guanidine Derivatives bearing acyl group were synthesized by the reaction of acyl chloride with 1,1,3,3-tetramethylguanidine. Their structures were confirmed by IR, H-1-NMR, EI-MS, HRMS and elementary analysis. One of them (4a) was also characterized by X-ray. Preliminary results of interaction with phosphate-containing biomolecules and adipate showed that all of them exhibited the abilities of molecular recognition.