Iron Chelators of the Pyridoxal-based Class. Part 7. The Synthesis and Single Crystal Structure of 1-(N-Ethoxy-carbonylmethylpyridoxyledenium)-2-(pyrimidyl)hydrazine Salts
作者:Shalom Sarel、Shelly Avramovici-Grisaru、Shmuel Cohen
DOI:10.3987/com-98-s51
日期:——
The syntheses of 1-pyridoxylidene-2-(2'-pyrimidyl)hydrazine (1), 1-(N-methylpyridoxylideniun)-2-(2'-pyrimidyl)hydrazine iodide (2), and 1-(N-ethoxycarbonyl methylpyridoxylidenium)-2-(pyrimidyl)hydrazine bromide (5a),and 1-(N-ethoxycarbonylmethylpyridoxylidenium)-2-(2'-pyrimidyl)hydrazine perchlorate (5b) are described. The single-crystal structure of 5b was determined from three-dimensional X-Ray data. Compound (5b), C16H22N5O8Cl, crystallizes in the space group P2(1)/c with Z = 4 and the following cell dimensions : a = 12.363 (3) Angstrom, b = 17.168(5) Angstrom, c = 9.657(3) Angstrom. The X-Ray data confirm that 5b crystallizes in the di-polar form, as a planar 20-membered ring dimer preferred motif of R-2(20)}. All the three proton-donors (O-1-H, O-2-H, and N-3-H), and only three (N-2, N-5, O-2) of the five available proton-accepters 5b, are utilized in hydrogen-bonding.