Thiophenol-Mediated 1,5-Hydrogen Atom Abstraction: Easy Access to Mono- and Bicyclic Compounds
作者:Florent Beaufils、Fabrice Dénès、Barbara Becattini、Philippe Renaud、Kurt Schenk
DOI:10.1002/adsc.200505211
日期:2005.10
method for cyclization of alkynes is described. The reaction cascade involves the intermolecular addition of a phenylthiyl radical to a terminal triple bond generating an alkenyl radical, followed by a 1,5-hydrogen atom transfer and a 5-exo-trig radical cyclization. This very efficient tin-free procedure allows one to prepare highly functionalized cyclopentane derivatives as well as fused bicyclic and
描述了硫代苯酚介导的炔烃环化方法。反应级联反应涉及在分子间将苯基噻吩基分子间加成到末端三键上,从而产生烯基基团,然后进行1,5-氢原子转移和5- exo- trig自由基环化。这种非常有效的无锡程序使人们可以从容易获得的前体制备高度官能化的环戊烷衍生物以及稠合的双环和螺环化合物。在该环化过程中,将苯硫基部分掺入最终的环化产物中。这种功能化对于产品的进一步转化特别有吸引力。