1. The literature concerning pseudo-Michael reactions of 2-aminoazaheterocycles with DEEM contains about 150 items. The full list of references is available upon request.
2. J. Agata, S. Naguchi and K. Tanaka, JP 73 34 897 (1973),
3. Chem. Abstr., 79, 42537d (1974).
4. Chem. Abstr. 97, 109954t (1983).