Interaction of β-Lactam Carbenes with 3,6-Diphenyltetrazines: A Five-Step Cascade Reaction for the Direct Construction of Indeno[2,1-b]pyrrol-2-ones

A study of the nucleophilic addition of β-lactam carbenes to 3,6-diphenyltetrazines is reported. Instead of the formation of pyrazole derivatives like most reactions between nucleophilic or ambiphilic carbenes and 3,6-disubstituted tetrazines, β-lactam carbenes reacted with 3,6-diphenyltetrazines to...

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Bibliographic Details
Published in:Journal of organic chemistry 2011-06, Vol.76 (11), p.4746-4752
Main Authors: Xing, Juan, Wang, Xiao-Rong, Yan, Cai-Xia, Cheng, Ying
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
Free radicals chemistry
Heterocyclic compounds
Heterocyclic compounds with only one n hetero atom and condensed derivatives
Heterocyclic compounds with several n hetero atoms in the same ring, in separated rings or in fused rings
Organic chemistry
Preparations and properties
Reactivity and mechanisms
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Summary:A study of the nucleophilic addition of β-lactam carbenes to 3,6-diphenyltetrazines is reported. Instead of the formation of pyrazole derivatives like most reactions between nucleophilic or ambiphilic carbenes and 3,6-disubstituted tetrazines, β-lactam carbenes reacted with 3,6-diphenyltetrazines to produce indeno[2,1-b]pyrrol-2-ones in good yields. The reaction proceeds most probably through a five-step cascade process. This work has not only provided a one-pot operation for the efficient construction of mutisubstituted indeno[2,1-b]pyrrol-2-ones but also revealed the nucleophilicity of β-lactam carbenes.
ISSN:0022-3263
1520-6904
DOI:10.1021/jo200499u