## Abstract Gas‐phase reactions of acylium ions with α,β‐unsaturated carbonyl compounds were investigated using pentaquadrupole multiple‐stage mass spectrometry. With acrolein and metacrolein, CH~3~—C^+^O, CH~2~CH—C^+^O, C~6~H~5~—C^+^O, and (CH~3~)~2~N—C^+^O react to variable extents by mono a
Polar [4 + 2+] Diels-Alder cycloadditions of acylium ions in the gas phase
✍ Scribed by Eberlin, Marcos N.; Cooks, R. Graham
- Book ID
- 127016803
- Publisher
- American Chemical Society
- Year
- 1993
- Tongue
- English
- Weight
- 1000 KB
- Volume
- 115
- Category
- Article
- ISSN
- 0002-7863
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## Abstract A novel reaction of acylium and thioacylium ions, polar [4 + 2^+^] Diels–Alder cycloaddition with 1,3‐dienes and __O__‐heterodienes, has been systematically investigated in the gas phase (Eberlin MN, Cooks RG. __J. Am. Chem. Soc.__ 1993; 115: 9226). This polar cycloaddition, yet without
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