Flash vacuum pyrolysis of acetylenic esters: A mechanistic study

被引：9
|
作者：
Al-Awadi, Nouria A. [1 ]
Mohamed, Asaad S. [1 ]
Habib, Osama M. [2 ]
Al-Awadhi, Fatma H. [3 ]
Al-Jalal, Nader A. [1 ]
Ibrahim, Yehia A. [1 ]
机构：
[1] Kuwait Univ, Fac Sci, Chem Dept, POB 5969, Safat 13060, Kuwait
[2] Kuwait Univ, Fac Med, Biochem Dept, Kuwait, Kuwait
[3] Kuwait Univ, Fac Pharm, Kuwait, Kuwait
来源：
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS | 2020年 / 146卷
关键词：
FVP; Acetylenic esters; Reaction mechanisms; Carbene intermediate; GAS-PHASE THERMOLYSIS; BENZOTRIAZOLE DERIVATIVES; CYCLIZATION;
D O I：
10.1016/j.jaap.2020.104778
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Products from flash vacuum pyrolysis of eleven acetylenic esters are reported in this study. The mechanism of their pyrolysis is proposed based on the products isolated. These reveal a combination of two main mechanistic approaches. Esters with beta-hydrogens favor a retro-ene reaction via a six-membered transition state, the absence of such beta-hydrogen leads to a carbene intermediate followed by insertion and cyclization.
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页数：10
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