作者:Ruben A Tommasi、William M Macchia、David T Parker
DOI:10.1016/s0040-4039(98)01222-2
日期:1998.8
We have developed a novel amidine synthesis that allows the preparation of heterocyclic amidines that were previously unknown and difficult to prepare by published methods. The route involves the lithiation of heterocycles by the action of n-BuLi followed by reaction with carbon disulfide and trapping with methyl iodide, yielding a dithioate ester. The latter, when heated in 20% methanolic ammonia
我们已经开发了一种新颖的am合成方法,该方法可以制备以前未知且难以通过公开方法制备的杂环am。该途径涉及通过正丁基锂的作用使杂环锂化,然后与二硫化碳反应并与碘甲烷捕集,得到二硫代酸酯。当在密封管中于80°C在20%的甲醇氨水中加热时,后者可直接提供杂环am,收率很高。通过使相应的盐酸盐结晶来分离产物。