成功开发了一种新的铜催化原位生成的芳基硫醇盐策略,该方法可使用以下方法一锅法从2-碘代苯胺合成一取代的苯并噻唑黄药作为硫醇的前体。具有电子释放基团和电子吸收基团的各种2-碘代苯胺以良好的产率产生相应的苯并噻唑。此外,该一锅法协议已成功用于合成有效的抗肿瘤药2-(3,4-二甲氧基苯基)-5-氟苯并[ d ]噻唑(PMX 610)。最后,铜催化原位生成芳基硫醇盐策略成功地用于邻卤代炔基苯的多米诺合成,该方法是使用邻卤代炔基苯黄药 作为硫醇的前体。
成功开发了一种新的铜催化原位生成的芳基硫醇盐策略,该方法可使用以下方法一锅法从2-碘代苯胺合成一取代的苯并噻唑黄药作为硫醇的前体。具有电子释放基团和电子吸收基团的各种2-碘代苯胺以良好的产率产生相应的苯并噻唑。此外,该一锅法协议已成功用于合成有效的抗肿瘤药2-(3,4-二甲氧基苯基)-5-氟苯并[ d ]噻唑(PMX 610)。最后,铜催化原位生成芳基硫醇盐策略成功地用于邻卤代炔基苯的多米诺合成,该方法是使用邻卤代炔基苯黄药 作为硫醇的前体。
Palladium Catalyzed Direct Acylation of Iodo-Acetanilides/Iodo-Phenyl Acetates: Domino One-Pot Synthesis of 2-Quinolinones
作者:Scuhand Basuli、Gedu Satyanarayana
DOI:10.1002/ejoc.201701250
日期:2018.2.28
acetates with aldehydes, was presented. Simple bench-top aldehydes were used as the non-toxic acylating agents. This protocol comprises direct coupling with aldehydes without activating the carbonyl group and without the directing group assistance. The strategy was applied to a domino one-potsynthesis of 2-quinolinones via acylation and intramolecularaldolcondensation. Significantly, the strategy was extended
Facile synthesis of 2-benzoxazoles <i>via</i> CuI/2,2'-bipyridine catalyzed intramolecular C-O coupling of 2-haloanilides
作者:Thachora Venu Saranya、Pambingal Rajan Sruthi、Saithalavi Anas
DOI:10.1080/00397911.2018.1554147
日期:2019.1.17
Development of newer methods for the synthesis of Benzoxazoles has of greater interest due to their wide range of biological activities and pharmaceutical importance. We herein report a facile and general method for the synthesis of 2-substituted Benzoxazoles via copper catalyzed intramolecular C-O cross-coupling of 2-haloanilides. A combination of CuI (5 mol%), 2,2'-bipyridine (10 mol%), Cs2CO3 (2 equiv.)
摘要 由于苯并恶唑的广泛生物活性和药学重要性,开发用于合成苯并恶唑的新方法引起了更大的兴趣。我们在此报告了一种通过铜催化的 2-卤代苯胺的分子内 CO 交叉偶联合成 2-取代苯并恶唑的简便通用方法。CuI (5 mol%)、2,2'-联吡啶 (10 mol%)、Cs2CO3 (2 当量) 在 DMF 溶剂中与 4 Å 分子筛在 140 °C 下的组合,说明了调节 2 反应性的范围-卤代苯胺以中等至良好的产率选择性形成一系列 2-烷基苯并恶唑衍生物。这是首次使用 CuI/2,2'-联吡啶作为催化体系合成 2-取代苯并恶唑的系统研究。发现反应的结果受 2-卤代苯胺的芳族和酰胺取代基的显着影响。图形概要
Novel and efficient heterogeneous polymer supported copper catalyst for synthesis of 2-substituted Benzoxazoles from 2-Haloanilides
作者:Thachora Venu Saranya、Pambingal Rajan Sruthi、Veena Raj、Saithalavi Anas
DOI:10.1016/j.jorganchem.2021.121733
日期:2021.4
A novel polymer supported copper complex is prepared by the immobilization of copper iodide on chemically modified polyacrylonitrile and its application in heterogeneous catalysis is described. The catalyst was prepared by easy method via synthetic modification of Polyacrylonitrile (PAN) using ethylene diamine followed by the complexation with CuI. After characterization, this complex was explored
Lewis Acid Catalyzed Atom-Economic Synthesis of C2-Substituted Indoles from <i>o</i>-Amido Alkynols
作者:Amol Milind Garkhedkar、Babasaheb Sopan Gore、Wan-Ping Hu、Jeh-Jeng Wang
DOI:10.1021/acs.orglett.0c00971
日期:2020.5.1
Herein we have disclosed a Zn(OTf)2 catalyzed synthesis of C2-alkyl substituted indole derivatives via unprecedented carbonyl group migration from o-amido alkynols. The key features of this protocol involve N,O-carbonyl group migration, broad substrate scope with varied functionality tolerance, moderate to good yields, and 100% atom economy. The crossover experiments proved that the migration is happening
Catalytic Asymmetric Synthesis of Atropisomeric <i>N</i>-Aryl 1,2,4-Triazoles
作者:Sooyun Choi、Melody C. Guo、Gavin M. Coombs、Scott J. Miller
DOI:10.1021/acs.joc.2c02727
日期:——
The atroposelective synthesis of N-aryl 1,2,4-triazoles was developed. A cyclodehydration reaction was rendered asymmetric with the use of a chiral phosphoric acid catalyst to afford atropisomeric N-aryl 1,2,4-triazoles in up to 91:9 er. Recrystallization of the isolated heterocycle further enriched the atropisomeric ratio of several analogs to 99:1 er or greater. A divergent and substrate-dependent
开发了N-芳基1,2,4-三唑的阻转选择性合成方法。使用手性磷酸催化剂使环脱水反应变得不对称,得到高达 91:9 er 的阻转异构N-芳基 1,2,4-三唑。分离出的杂环的重结晶进一步将几种类似物的阻转异构体比率富集至99:1er或更高。还公开了产生不同杂环产物的不同且底物依赖性反应途径。