通过环保方法合成了一系列苄基取代的硫代苯并唑,以寻找新的抗真菌农药。使用KOH,苄基卤化物和水从2-巯基苯并恶唑开始制备化合物,这是一种简单而生态的方法。测试了针对一组植物致病真菌的新型抗真菌药。两种化合物对灰霉病菌,尖孢镰刀菌和曲霉属菌显示出有趣的活性:2-((4-(三氟甲基)苄基)硫代)苯并[ d ]噻唑,3ac和2-((4-甲基苄基)硫代)苯并[ d ]噻唑,3al。因此,3ac和3al可以被认为是广谱抗真菌药。此外,与之相比,两种新化合物2-((4-碘苄基)硫代)苯并[ d ]噻唑和3ba 2-(苄硫基)苯并[ d ]恶唑和3ba具有更好的抑制灰葡萄孢和尖孢镰刀菌的作用。商用杀菌剂Captan。因此,可以将3aj和3ba视为减谱抗真菌剂。
exhibited significant activity against both sensitive and resistant strains of M. tuberculosis and also against non-tuberculous mycobacteria. To facilitate drug design of benzoxazole as potentialantituberculosisagent, we have explored the quantitative structure–activity relationship (QSAR). We demonstrated that lower lipophilicity has significant contribution to activity. Dinitrobenzylsulfanyl derivative
Three‐Component Synthesis of 2‐Substituted Thiobenzoazoles Using Tetramethyl Thiuram Monosulfide (TMTM) as Thiocarbonyl Surrogate
作者:Xi Wang、Chun‐Yan Wu、Yue‐Sheng Li、Zhi‐Bing Dong
DOI:10.1002/ejoc.202001214
日期:2020.11.22
A metal‐free synthesis of 2‐benzyl/allyl‐substituted thiobenzoazoles was developed starting from tetramethyl thiuram monosulfide (TMTM) which served as thiocarbonyl surrogate. By using 2‐aminophenols (or 2‐aminothiophenols, or 1,2‐phenylenediamines) and TMTM as starting materials, 2‐mercaptobenzoazoles could be synthesized efficiently, and the subsequent C–S bond formation with allyl/benzyl halides
A transition-metal-free protocol for the one-pot synthesis of 2-benzyl/2-allyl-substituted thiobenzoazoles in water was developed. The cyclization of 2-aminothiophenols, 2-aminophenols, and 1,2-phenylenediamines with tetramethylthiuram disulfide (TMTD) gave mercapto benzoheterocycles, and the subsequent C-S coupling with benzyl or allyl halides furnished the desired products in good to excellent yields. This method features transition-metal-free conditions with water as a solvent, an easy performance, mild reaction conditions, a wide substrate scope, and good to excellent yields, thus paving an efficient and useful way to establish a library of potentially active drug molecules.
DBU-Promoted Deaminative Thiolation of 1<i>H</i>-Benzo[<i>d</i>]imidazol-2-amines and Benzo[<i>d</i>]oxazol-2-amines
deaminative thiolation reaction of 1H-benzo[d]imidazol-2-amines and benzo[d]oxazol-2-amines has been developed at room temperature conditions in a one-pot protocol. This practical three-component strategy represents a novel and environmentally friendly reaction pathway toward the straightforward synthesis of various 2-thio-1H-benzo[d]imidazoles and 2-thiobenzo[d]oxazolesusing carbon disulfide as a