摘要
以三氟乙酰乙酸乙酯和盐酸胍为原料,经环合、氯化、甲氧基化、胺化反应合成了4种2-氨基4-取代-6.三氟甲基嘧啶中间体(Ⅰa~Ⅰd),Ⅰ与邻甲氧羰基苯磺酰异氰酸酯亲核加成,合成了3种含不同取代嘧啶环的磺酰脲化合物(Ⅱb~Ⅱd)。其中2-氨基4-二甲胺基-6-三氟甲基嘧啶(Ⅰd)和N-[2-(4-二甲胺基-6-三氟甲基)嘧啶基]-2-甲氧羰基苯磺酰脲(Ⅱd)为新化合物,结构经^1H NMR和MS表征。初步除草活性测定结果表明,N-[2’-(4-甲氧基-6-三氟甲基)嘧啶基]-2-甲氧羰基苯磺酰脲(Ⅱe)在浓度为200ga.i./ha时对稗草和马唐的防效分别为70%和50%。
Four 2-amino-4-substitued-6-trifluoromethylpyrimidines ( Ⅰa~Ⅰd) were synthesized from guanidine hydrochloride and ethyl trifluoroacetoacetate by cyclization, chlorination, methoxylation and amination. N-[ 2'- (4-substituted-6-trifluoromethyl) pyrimidyl ] -2-methoxycarbonylphenylsulfonylureas ( Ⅱb~Ⅱd) were obtained from Ⅰ and 2-methyloxycarbonylbenzene sulfonylisocyanate. 2-amino-4-dimethylamino-6-trifluoromethylpyrimidine (Ⅰd ) and N- [ 2'- ( 4-dimethylamino-6-trifluoromethyl ) pyrimidyl ] -2-methoxycarbonylphenylsulfonylurea (Ⅱd) were new compounds and the structurs were confirmed by ^1H NMR and MS. Biological activity testing in the greenhouse indicated that N-[2'-(4- methoxyl-6-trifluoromethyl ) pyrimi dyl ] -2 -methoxycarbonylphe nylsulfonylurea (Ⅱc ) showed good herbicidal activity, with 200 ga. i./ha providing 70% and 50% inhibition rate of Echinochloa Crusgalli (L.) Baeuv and Digitaria Sanguinalis( L. ) Scop.
出处
《合成化学》
CAS
CSCD
2006年第6期597-599,602,共4页
Chinese Journal of Synthetic Chemistry
关键词
三氟甲基嘧啶
磺酰脲
除草活性
合成
中间体
trifluoromethylpyrimidine
sulfonylurea
herbicidal activity
synthesis
intermediate