Photoactivated miticidal and insecticidal ethynyl-thiazoles
申请人:FMC Corporation
公开号:US04889867A1
公开(公告)日:1989-12-26
Pesticidal 5-ethynyl substituted thizoles, compositions thereof and use thereof as insecticides and miticides are disclosed and exemplified.
本发明公开并且举例说明了杀虫剂和杀螨剂,其为杀虫剂和杀螨剂的5-乙炔基取代噻唑类化合物及其组合物。
Neighbouring group effects on rates of thermolysis of 4-azidothiazoles
作者:Erik Ceulemans、Karin Vercauteren、Leonard K. Dyall、Dirk Buelens、Wim Dehaen
DOI:10.1016/s0040-4020(97)00638-8
日期:1997.7
Rate measurements for thermolysis of 4-azidothiazoles in p-xylene solution have identified neighbouring group effects from nitro (19-fold rate increase), phenyliminomethyl (16), formyl (4.5) and acetyl (2.2) substituents in the 5-position. These effects are very similar in magnitude to those measured for 3-azidothiophenes, whereas in azidobenzenes the rate increases are much larger, 5-Substituents in 4-azidothiazole which are capable of conjugative donation (phenyl, ethyl propenoate) also increased the reaction rate. The reactions involving neighbouring group participation led to cyclized products from the 4-azidothiazoles though not all of these products were stable under the thermolysis conditions. (C) 1997 Elsevier Science Ltd.
Begtrup, Mikael; Hansen, Lars Bo L., Acta Chemica Scandinavica, 1992, vol. 46, # 4, p. 372 - 383