Synthesis and molluscicidal evaluation of some new pyrazole, isoxazole, pyridine, pyrimidine, 1,4-thiazine and 1,3,4-thiadiazine derivatives incorporating benzofuran moiety
作者:M.F. El Shehry、R.H. Swellem、Sh.M. Abu-Bakr、E.M. El-Telbani
DOI:10.1016/j.ejmech.2010.07.043
日期:2010.11
Chalcone derivative 3 was synthesized via the base catalyzed Claisen–Schmidt condensation and was used as a precursor for synthesizing pyrazoline 11, isoxazoline 12, pyrazoline carbothioamide 13, 5,6-dihydropyrimidine-2-(1H)-thione 14 and aminopyridinecarbonitrile derivative 15. Bromination of 3 afforded the dibromo derivative 4. Monobromo derivative 5 obtained by boiling 4 in dry benzene in the presence
查耳酮衍生物3合成通过催化克莱森-施密特缩合反应的基,并作为前体用于合成吡唑啉11,异恶唑啉12,吡唑啉硫代甲酰胺13,5,6-二氢-2-(1- ħ) -硫酮14和aminopyridinecarbonitrile衍生物15。3的溴化得到二溴衍生物4。在三乙胺的存在下,将4在无水苯中沸腾得到的一溴衍生物5。熔融的噻二嗪9a,b和1,4-噻嗪9c通过用4-amino-4 H -1,2,4-triazole-3-thiol(6)或1-amino-2-mercapto-5-methylpyrimidin-4(1 H)处理α-溴丙烯酮衍生物5合成衍生物)(一)(7)或与2-氨基硫酚(8)一起溶于乙醇氢氧化钾溶液中。新合成的化合物筛选它们杀软体动物活性,而化合物3,4,图9A,11和15显示出有希望的杀软体动物的活性。在另一方面化合物5,图9b,图9c,12,与标准杀软体动物剂(Bayluscide)相比,图13和14显示出中等作用。