Facile Synthesis of Tetrahydro-1<i>H</i>-isoindolones via a Sequential Three-Component Copper-Catalyzed Coupling/Propargyl-Allenyl Isomerization/[4 + 2] Cyclization Reaction
作者:Jian Cao、Xian Huang
DOI:10.1021/ol102235t
日期:2010.11.5
An interesting sequential three-componentcopper-catalyzed coupling/propargyl-allenyl isomerization/[4 + 2] cyclization reaction, providing a facile synthesis of highly substituted tetrahydro-1H-isoindolones from conjugated vinylic alkynes, imines, and α,β-unsaturated enoic acid chlorides is reported. The most attractive feature of this transformation is that three stereogenic centers could be generated
Application of Bis(trimethylsilyl) Phosphonite in the Efficient Preparation of New Heterocyclic α-Aminomethyl-H-phosphinic Acids
作者:Tomasz Olszewski、Bogdan Boduszek
DOI:10.1055/s-0030-1258387
日期:2011.2
efficient preparation of new heterocyclic α-aminomethyl-H-phosphinic acids is reported. The synthetic protocol is based on the application of bis(trimethylsilyl) phosphonite, as an efficient phosphorous nucleophile, in the reaction with the corresponding heterocyclic imines. Subsequent methanolysis of the addition intermediates leads to the expected heterocyclic α-aminomethyl-H-phosphinic acids in fair
作者:Joshua Britton、Jared W. Castle、Gregory A. Weiss、Colin L. Raston
DOI:10.1002/chem.201602373
日期:2016.7.25
continuously fed through a thin‐film reactor where the intermediates accrue molecular complexity as they progress through the flow system. Flow chemistry allows rapid multistep transformations to occur via reaction compartmentalization, an approach not amenable to using conventional flasks. Thin film processing can also access facile in situ solvent exchange to drive reaction efficiency, and through this method
受大自然通过连续合成转化构建复杂分子的能力的启发,α-氨基膦酸盐的流水线合成方法已被开发出来。在这种方法中,简单的起始材料连续地通过薄膜反应器,其中中间体在流过流动系统时会增加分子的复杂性。流动化学允许通过反应区室化进行快速的多步转化,这种方法不适合使用传统的烧瓶。薄膜加工还可以进行方便的原位溶剂交换以提高反应效率,通过这种方法,α-氨基膦酸酯的合成仅需要443 s的停留时间即可产生3.22 g h -1。流水线合成实现了前所未有的反应灵活性和加工效率。
Methyl-triflate-mediated dearylmethylation of <i>N</i>-(arylmethyl)carboxamides <i>via</i> the retro-Mannich reaction induced by electrophilic dearomatization/rearomatization in an aqueous medium at room temperature
Dearylmethylation of N-(arylmethyl)carboxamides was achieved under metal-free conditions in an aqueous medium induced by electrophilic dearomatization/rearomatization.