Syntheses, structure analyses, and reactions of 1,3,5-trioxepanes and related compounds
作者:Kevin J. McCullough、Araki Masuyama、Keith M. Morgan、Masatomo Nojima、Yuji Okada、Syuzo Satake、Shin-ya Takeda
DOI:10.1039/a802928h
日期:——
Acid-catalysed condensations of 1,5- or 1,6-dicarbonyl compounds with ethylene glycol give 1,3,5-trioxepane derivatives as a result of neighbouring participation by the adjacent carbonyl group during the acetalization process. With trimethyleneglycol, the related 1,3,5-trioxocanes have also been obtained. Reaction of the 1,3,5-trioxepanes with (a) Grignard reagents gives dialkyl-substituted cyclic
The Epigenetic Toxicity of Pyrene and Related Ozonation Byproducts Containing an Aldehyde Functional Group
作者:Holly A. Herner、James E. Trosko、Susan J. Masten
DOI:10.1021/es0106117
日期:2001.9.1
Gap junction intercellular communication (GJIC) was used to assess the epigenetic toxicity of pyrene, pure byproducts of pyrene ozonation, and other compounds similar in chemical structure. Byproduct mixtures collected from HPLC were also evaluated using GJIC. Of the 11 pure compounds studied, five inhibited GJIC completely. Two inhibiting compounds contained four rings and were the only compounds studied with greater than three rings. The remaining three compounds contained either two or three rings, and all three contained an aldehyde group. Toxicological evaluation and GC/MS of impure byproduct mixtures showed that two common compounds were found in inhibiting fractions. These common compounds contained both a bay region and at least one aldehyde group.
SUGIMOTO, TOSHIYA;NOJIMA, MASATOMO;KUSABAYASHI, SHIGEKAZU, J. ORG. CHEM., 55,(1990) N2, C. 3816-3820