PHOTODEHYDROCY CLIZATIONS OF STILBENE-LIKE COMPOUNDS VII1 Synthesis and properties of the double helicene, diphenanthro[3,4-c; 3',4'-/]chrysene

PHOTODEHYDROCY CLIZATIONS OF STILBENE-LIKE COMPOUNDS VII1 Synthesis and properties of the double helicene, diphenanthro[3,4-c; 3',4'-/]chrysene BY

PHOTODEHYDROCYCLIZATIONS OF STILBENE-LIKE COMPOUNDS VIII1 Synthesis of hexaheliceno[3,4-c]hexahelicene BY

Synthesis, Characterization, and Theoretical Studies of the New Antibacterial Zn(II) Complexes from New Fluorescent Schiff Bases Prepared by imidazo[4',5':3,4]benzo[1,2-c]isoxazole

The novel fluorescentheterocyclic bidentate ligands have been synthesized by the high yields reaction of 8-(4-chlorophenyl)-3-Iso-butyl-3H-imidazo[4',5':3,4]benzo[1,2-c]isoxazol-5-amine with p-hydroxybenzaldehyde and p-chlorobenzaldehyde. The ligands reacted with Zn(II) ion to gained novel complexes. The optical properties of these structures were checked and the outcomes represented that t...

PHOTODEHYDROCYCLIZATIONS OF STILBENE-LIKE COMPOUNDS VIII1 Synthesis of hexaheliceno[3,4-c]hexahelicene

Tumorigenicity of bay-region epoxides and other derivatives of chrysene and phenanthrene in newborn mice.

nogenic activity (4). Chrysene, which has one more benzene ring than does phenanthrene, is a symmetrical molecule with 2 identical bay regions (Chart 1). Chrysene has weak activity in carcinogenicity tests (4, 11). Quantum mechanical aspects of the bay region theory predict (6) that bay-region 1,2-diol 3,4-epoxides of chrysene and phenanthrene should have sim ilar chemical reactivities. Kinetic...