The mass spectrometric behavior of 1-alkyl-5-(1H-indol-2-yl)pyrrolidin-2-ones and 1-alkyl-5-(1H-indol-3-yl)pyrrolidin-2-ones was studied and the fragmentation of these compounds was established. The product of N-methylindole reaction with 1-benzyl-5-hydroxypyrrolidin-2-one was shown to be 1-benzyl-5-(1-methylindol-3-yl)pyrrolidin-2-one.

中文翻译：

---

新型1-烷基-5-（吲哚-2（3）-基）吡咯烷丁-2-酮的合成及光谱特征

研究了1-烷基-5-（1 H-吲哚-2-基）吡咯烷丁-2-酮和1-烷基-5-（1 H-吲哚-3-基）吡咯烷丁-2-酮的质谱行为并确定了这些化合物的碎片。N-甲基吲哚与1-苄基-5-羟基吡咯烷酮-2-酮反应的产物显示为1-苄基-5-（1-甲基吲哚-3-基）吡咯烷酮-2-酮。