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7493933 
Journal Article 
Thermal[4 π + 2π]-type cycloaddition reactions of pyrrole derivatives with 3-cyanocyclopropene generated in situ 
Saito, K; Ito, K; Takahashi, K 
1989 
Yes 
Heterocycles
ISSN: 0385-5414 
29 
11 
2135-2140 
English 
Thermal reactions of 3-cyanocyclopropene with 1-methoxy-carbonyl-, 1-benzoyl- and 1-phenylpyrroles afforded [4π + 2π]-type cycloaddition products, while 1-methyl- and 1-methyl-3-acetylpyrroles did not give any adducts. The adduct of 1-benzoylpyrrole existed as a mixture of two rotamers because of the hindered rotation of the carbamate group. © 1989.