factor-active drugs. The use of the piperidine catalyst and no catalyst showed very high cis-stereoselectivity (cis/trans = 10/1—50/1) during the reaction. On the other hand, the trans-selective reaction was promoted by Ti(O-i-Bu)4 and Al(O-s-Bu)3 catalysts (cis/trans = 1/8—1/25). Both reactions were conducted with higher cis- and trans-selectivities as compared with those of the alkyl 2-mercaptoalkanoates under
Synthesis and spectroscopic studies of some hydrogenated thiazolo[2,3- a ]isoquinolines
作者:Maria D Rozwadowska、Agnieszka Sulima
DOI:10.1016/s0040-4020(01)00224-1
日期:2001.4
4-dihydroisoquinoline derivatives under the action of α-mercapto alkanoic acids or ethylenesulfide, respectively. In the synthesis of compounds 2 and 5 isothiocarbostril (13) and N-thioacetyl-β-phenylethylamine derivatives (14), respectively, were also used as substrates and treated with bromoacetic acid derivatives. Spectral characteristics (IR, 1H, 13C NMR and MS) of compounds 1–12 are presented.
Two distinctive methods for the synthesis of cis- and trans-2, 5-disubstituted-thiazolidin-4-ones via stereoselective cyclo-condensation between α-mercaptocarboxylic esters and arylimines have been developed. With the new reaction used as the key step, two sets of optically active anti-PAF active thiazolidin-4-ones were synthesized.
Discovery of <i>N</i>-Phenylaminomethylthioacetylpyrimidine-2,4-diones as Protoporphyrinogen IX Oxidase Inhibitors through a Reaction Intermediate Derivation Approach
作者:Da-Wei Wang、Lu Liang、Zhi-Yuan Xue、Shu-Yi Yu、Rui-Bo Zhang、Xia Wang、Han Xu、Xin Wen、Zhen Xi
DOI:10.1021/acs.jafc.1c00796
日期:2021.4.14
(NtPPO) inhibitory and herbicidal activity evaluations led to identifying some compounds with improved NtPPO inhibition potency than saflufenacil and good post-emergence herbicidal activity at 37.5–150 g of ai/ha. Among these analogues, ethyl 2-((((2-chloro-4-fluoro-5-(3-methyl-2,6-dioxo-4-(trifluoromethyl)-3,6-dihydropyrimidin-1(2H)-yl)phenyl)amino)methyl)thio)acetate (2c) (Ki = 11 nM), exhibited excellent
原卟啉原氧化酶(PPO,EC 1.3.3.4)是发现绿色除草剂的有效靶点。在这项工作中,我们在研究我们最初设计的N-苯基尿嘧啶噻唑烷酮 ( 1 ) 的反应中间体的基础上,意外发现了一系列新的N-苯基氨基甲硫基乙酰基嘧啶-2,4-二酮 ( 2-6 ) 作为有前景的 PPO 抑制剂。开发了一种高效的一锅法程序,可以以良好到高的收率产生 41 种目标化合物。系统性烟草PPO (NtPPO) 抑制和除草活性评估导致鉴定出一些化合物,其 NtPPO 抑制效力优于苯嘧磺草胺,并且在 37.5-150 g ai/ha 下具有良好的芽后除草活性。在这些类似物中,乙基 2-((((2-氯-4-氟-5-(3-甲基-2,6-二氧代-4-(三氟甲基)-3,6-二氢嘧啶-1(2 H )-基)苯基)氨基)甲基)硫代)乙酸酯 ( 2c ) ( K i = 11 nM),在 37.5–150 g ai/ha 时表现出优异的杂草控制效果,并且在