On the Question of Stepwise [4+2] Cycloaddition Reactions and Their Stereochemical Aspects

被引：27
|
作者：
Jasinski, Radomir [1 ]
机构：
[1] Cracow Univ Technol, Dept Organ Chem & Technol, Warszawska 24, PL-31155 Krakow, Poland
来源：
SYMMETRY-BASEL | 2021年 / 13卷 / 10期
关键词：
Diels-Alder reaction; 4+2] cycloaddition; mechanism; zwitterionic intermediates; biradicals; DIELS-ALDER REACTION; THEORETICAL-ANALYSIS; MOLECULAR-MECHANISM; CYCLOPENTADIENE; BUTADIENE; ETHYLENE; NITROALKENES; 2-BROMO-2-NITROETHENYLPHOSPHONATE; DERIVATIVES; KINETICS;
D O I：
10.3390/sym13101911
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Even at the end of the twentieth century, the view of the one-step [4+2] cycloaddition (Diels-Alder) reaction mechanism was widely accepted as the only possible one, regardless of the nature of the reaction components. Much has changed in the way these reactions are perceived since then. In particular, multi-step mechanisms with zwitterionic or diradical intermediates have been proposed for a number of processes. This review provided a critical analysis of such cases.
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页数：17
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