“…Due to the growing interest to the synthesis of new drugs [1][2][3], antimicrobial agents [4][5][6][7][8][9], functionalized heterocyclic compounds [10][11][12][13][14] and aromatic a-amino acids [15] on the ground of the Meerwein reaction [16], the necessity to evaluate criteria of activities of corresponding unsaturated compounds (UC) as substrates in such syntheses grows. It is a well known fact that olefins, dienes and other UC with strong electron withdrawing groups (COOH, CN, CHO, COCH 3 , etc.)…”