作者:Jean-Luc Boucher、Lucien Stella
DOI:10.1016/s0040-4020(01)87541-4
日期:1986.1
With acyclic dienes the reactions are regio and stereoselective. These both selectivities can be enhanced by Lewis acid catalysis. The stereochemical assignments of the adducts are performed on the basis of spectroscopie data. Then, the cycloadducts are transformed to cyclic (or polycyclic) dienic compounds by sequential oxydation and elimination reactions. Thus, the α-methylthio-acrylonitrile can be considered
研究了α-甲硫基丙烯腈与1,3-二烯的环加成反应。未催化的热反应与环状二烯非常立体选择性地高产率地进行,尤其是即使在室温下与环戊二烯也是如此。在后面的案例中,我们显示了立体选择性随温度升高而降低。对于无环二烯,反应是区域性和立体选择性的。这两种选择性都可以通过路易斯酸催化来提高。根据光谱数据进行加合物的立体化学分配。然后,通过顺序的氧化和消除反应将环加合物转化为环状(或多环)二烯化合物。因此,对于Diels-Alder反应,可以将α-甲硫基丙烯腈视为有效的氰基-乙炔当量。