Synthesis of Tris(Arylthio)-1,3-Butadienes by Nucleophilic Vinylic Substitution of Polyhalogenated Nitrodienes and Structural Elucidation of the Products


Gokmen Z., Deniz N. G., Ibis C.

PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS, cilt.190, sa.1, ss.93-102, 2015 (SCI-Expanded) identifier identifier

Özet

The reactions of polyhalo-2-nitro-1,3-butadiene with naphthalene-2-thiol and 4-methylbenzenethiol lead to highly functionalized poly(arylthio)-2-nitro-1,3-butadienes. The novel 4,4-dichloro-1,1,3-tris(2-naphthylthio)-2-nitro-1,3-butadiene (5a) and the known 4,4-dichloro-1,1,3-tris(4-methylphenylthio)-2-nitro-1,3-butadiene (5b) were synthesized by vinylic substitution of 1,1,3,4,4-pentachloro-2-nitro-1,3-butadiene with naphthalene-2-thiol and 4-methylbenzenethiol, respectively. X-ray crystal structure analyses of tris(arylthio)-2-nitro-1,3-butadienes are quite rare in the literature. Both 5a and 5b crystallize in the monoclinic space group P21/c with a = 10.5068(3) angstrom, b = 19.2468(7) angstrom, c = 15.0354(6) angstrom, Z = 4 for 5a and a = 10.7087(5) angstrom, b = 19.3315(7) angstrom, c = 12.8395(5) angstrom, Z = 4 for 5b. The structures have been solved by direct methods (SIR92) and refined to the residual index R-1 = 0.053 for 5a and R-1 = 0.048 for 5b. The structure of 5a was also characterized by NMR, mass and FTIR spectroscopy.