β—氰酯通常是用作合成2—吡咯啉酮的原料;近来由于它的广泛应用,已经感到由于缺乏便利的合成方法而使它的供应受到限制。以往这些物貭的合成,由于它的产率低,起始原料貴,并要用到危险的氰化氢,而感到有許多缺点。最近作者发现, Beta-Cyano esters are commonly used as starting materials for the synthesis of 2-pyrrolone; recently it has been felt due to its widespread use that its supply has been limited due to the lack of convenient synthesis methods. In the past, the synthesis of these objects has many shortcomings due to its low yield, expensive starting materials and the use of dangerous hydrogen cyanide. Recently the author found that