Steric effects ih the reaction of di(bromomagnesio)alkanes with carboxylic esters
作者:Perséphone Canonne、Denis Bélanger、Gilles Lemay
DOI:10.1016/s0040-4039(01)92402-5
日期:1981.1
Largely different product distributions were observed on the action of various carboxylic esters with 1,4-di(bromomagnesio)butane and its homologue 1,5-di(bromomagnesio)pentane. The much larger yields of reduction product with the latter are the evidence for the structural geometric requirements for the annelation step.
Aerobic oxidation of secondary benzylic alcohols and direct oxidative amidation of aryl aldehydes promoted by sodium hydride
作者:Xinbo Wang、David Zhigang Wang
DOI:10.1016/j.tet.2011.03.052
日期:2011.5
possible mechanistic implications of a simplest oxidant (NaH/air) uncovered on a broad range of useful transformations, including aerobic alcoholoxidations, allylicalcohol isomerizations and oxidations, cyclopropyl alcoholfragmentations, and direct aryl aldehyde oxidative amidations. These readily implementable transition-metal-free processes feature exceptional material accessibility, operational simplicity
Quantitative dynamic capsule–capsule conversion by cooperative binding one carbonate anion and switchable dual catalysis was achieved within an Ir2Co3-type capsule.
通过在Ir2Co3型胶囊内协同结合一个碳酸根离子和可切换的双重催化,实现了定量动态胶囊-胶囊转化。
Exploring isonitrile-based click chemistry for ligation with biomolecules
作者:Henning Stöckmann、André A. Neves、Shaun Stairs、Kevin M. Brindle、Finian J. Leeper
DOI:10.1039/c1ob06424j
日期:——
We show here that isonitriles can perform click reactions with tetrazines in aqueousmedia, making them promising candidates for ligation reactions in chemical biology and polymer chemistry. This is the first time that a [4+1] cycloaddition has been used as a biocompatibleligation reaction.
A transition-metal-free sp3 C–H amination reaction has been established for imidazo[1,5-a]pyridine synthesis employing molecular iodine from 2-pyridyl ketones and alkylamines. In the presence of sodium acetate (NaOAc), the I2-mediated oxidative annulations of readily available substrates produced a variety of imidazo[1,5-a]pyridinederivatives efficiently in a one-pot manner. The present synthetic
已经建立了一种无过渡金属的sp 3 C-H胺化反应,该反应可使用2-吡啶基酮和烷基胺中的分子碘来合成咪唑并[1,5- a ]吡啶。在乙酸钠(NaOAc)的存在下,易于获得的底物的I 2介导的氧化环化反应以一锅法高效产生了各种咪唑并[1,5- a ]吡啶衍生物。本合成方法操作上简单,并且可以以克为单位方便地进行。此外,在最佳反应条件下,一系列1-(2-吡啶基)咪唑并[1,5- a由相应的二-2-吡啶基酮和取代的苄胺可容易地以令人满意的产率制备]吡啶半胱氨酸蛋白酶抑制剂。