Cu(OTf)2介导的S N 2型亲核开环的高效策略,然后进行许多2-芳基-N-甲苯磺酰氮杂环丁烷与腈的[4 + 2]环加成反应,从而得到各种取代的四氢嘧啶据报道产量极高。所得的四氢嘧啶可通过酸催化的水解容易地转化为合成上重要的1,3-二胺。该策略已扩展到由对映纯二取代的氮杂环丁烷合成对映体纯的四氢嘧啶。反应通过我们之前提出的S N 2型机理进行。
An efficient synthetic route to substituted tetrahydropyrimidines by Cu(OTf)2-mediated nucleophilic ring-opening followed by the [4+2] cycloaddition of N-tosylazetidines with nitriles
作者:Manas K. Ghorai、Kalpataru Das、Amit Kumar
DOI:10.1016/j.tetlet.2008.12.035
日期:2009.3
A highly efficient strategy for Cu(OTf)2-mediated SN2 type nucleophilic ring-opening followed by the [4+2] cycloaddition reactions of a number of 2-aryl-N-tosylazetidines with nitriles to afford a variety of substituted tetrahydropyrimidines in excellent yields is reported. The resulting tetrahydropyrimidines could easily be transformed into synthetically important 1,3-diamines by acid-catalyzed hydrolysis
Cu(OTf)2介导的S N 2型亲核开环的高效策略,然后进行许多2-芳基-N-甲苯磺酰氮杂环丁烷与腈的[4 + 2]环加成反应,从而得到各种取代的四氢嘧啶据报道产量极高。所得的四氢嘧啶可通过酸催化的水解容易地转化为合成上重要的1,3-二胺。该策略已扩展到由对映纯二取代的氮杂环丁烷合成对映体纯的四氢嘧啶。反应通过我们之前提出的S N 2型机理进行。