
Tetrahedron p. 11489 - 11498 (1994)
Update date:2022-08-03
Topics: Synthesis Experimental terms
Ibrahim, Yehia A.
Elwahy, Ahmed H. M.
Abbas, Ashraf A.
The macrocyclic crown-formazans 7a-c, 12a-g were prepared by the azo-coupling of the appropriate bis-diazonium salts 4a-c with pyruvic acid and arylpyruvic acids 8a-c.The ready accessability of the latters offers an easy access towards 1,5-symmetrically d
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