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Article

(3+2)-Cycloaddition of N-benzylazomethine methylide with 4-arylidene-1H-imidazol-5(4H)-ones

Chemistry Of Heterocyclic Compounds. 2020. Vol. 56. No. 1. P. 108-111.
Kuleshov A. V., Solyev P. N., Volodin A. D., Korlyukov A. A., Baranov M. S., Mikhaylov A. A.

4-Arylidene-1H-imidazol-5(4H)-ones react with N-benzylazomethine methylide under trifluoroacetic acid catalysis to form 9-aryl-1,3,7- triazaspiro[4.4]non-1-en-4-ones in 66–95% yields as one diastereomer in each case.