The Diels–Alder reactivity of (E)-3-phenylsulfonylprop-2-enenitrile, a cyanoacetylene equivalent
作者:Pamela J. Bradley、David H. Grayson
DOI:10.1039/b203391g
日期:——
(E)-3-Phenylsulfonylprop-2-enenitrile undergoes facile DielsâAlder reactions, moderate regioselectivity being observed with several unsymmetrical dienes. Danishefsky's diene and furfuryl alcohol react regioselectively. The cycloadducts formed with cyclopentadiene and with anthracene undergo base-catalysed elimination of benzenesulfinic acid to yield α,β-unsaturated nitriles.
(E)-3-苯磺酰基丙-2-烯腈很容易发生 DielsâAlder 反应,与几种不对称的二烯发生中等程度的区域选择性反应。达尼舍夫斯基二烯和糠醇的反应具有区域选择性。与环戊二烯和蒽形成的环加载物在苯亚磺酸的碱催化下发生消除反应,生成δ,δ-不饱和腈。