Chemoselective Acylation of Primary Amines and Amides with Potassium Acyltrifluoroborates under Acidic Conditions
作者:Alberto Osuna Gálvez、Cédric P. Schaack、Hidetoshi Noda、Jeffrey W. Bode
DOI:10.1021/jacs.7b00059
日期:2017.2.8
proceeds rapidly in water. The reaction is fast at acidic pH and tolerates alcohols, carboxylic acids, and even secondary amines in the substrates. It is applicable to the functionalization of primary amides, sulfonamides, and other N-functional groups that typically resist classical acylations and can be applied to late-stage functionalizations.
当前用于构建酰胺键的方法通过脱水偶联过程将胺和羧酸连接起来,该过程通常需要有机溶剂、昂贵且通常危险的偶联试剂,并掩盖其他官能团。在这里,我们描述了使用伯胺和酰基三氟硼酸钾的酰胺形成,由在水中快速进行的简单氯化剂促进。该反应在酸性 pH 值下很快,并且可以耐受底物中的醇、羧酸,甚至仲胺。它适用于伯酰胺、磺酰胺和其他通常抵抗经典酰化的 N 官能团的官能化,并可应用于后期官能化。
A FACILE SYNTHESIS OF CARBOXYLIC ESTERS AND CARBOXAMIDES BY THE USE OF 1,1′-DIMETHYLSTANNOCENE AS A CONDENSING REAGENT
Various carboxylic esters or carboxamides are prepared in good yields under nearly neutral conditions from equimolar amounts of free carboxylic acids and alcohols or amines, respectively, by the use of 1,1′-dimethylstannocene as a condensing reagent.
Antagonism of Quorum Sensing Phenotypes by Analogs of the Marine Bacterial Secondary Metabolite 3-Methyl-N-(2′-Phenylethyl)-Butyramide
作者:Susan M. Meschwitz、Margaret E. Teasdale、Ann Mozzer、Nicole Martin、Jiayuan Liu、Stephanie Forschner-Dancause、David C. Rowley
DOI:10.3390/md17070389
日期:——
3-methyl-N-(2'-phenylethyl)-butyramide, produced by a marine bacterium identified as Halobacillus salinus, inhibits QS controlled phenotypes in multiple Gram-negative reporter strains. Here we report that N-phenethyl hexanamide, a structurally-related compound produced by the marine bacterium Vibrio neptunius, similarly demonstrates QS inhibitory properties. To more fully explore structure-activity relationships
Amide-Forming Ligation of Acyltrifluoroborates and Hydroxylamines in Water
作者:Aaron M. Dumas、Gary A. Molander、Jeffrey W. Bode
DOI:10.1002/anie.201201077
日期:2012.6.4
Come together, right now: Acyltrifluoroborates and O‐benzoyl hydroxylamines come together to form amides in water (see scheme). The ligations are complete within minutes at room temperature and do not require any reagents or catalysts. The reaction has a broad substrate scope and tolerates unprotected functional groups.
Synthesis and chemoselective ligations of MIDA acylboronates with O-Me hydroxylamines
作者:Hidetoshi Noda、Jeffrey W. Bode
DOI:10.1039/c4sc00971a
日期:——
N-Methyliminodiacetyl (MIDA) acylboronates undergo chemoselective amide-bond forming ligations in water with O-Me hydroxylamines, including unprotected peptide substrates. These bench-stable boronates were easily prepared from potassium acyltrifluoroborates (KATs) in one step. The reactivity of MIDA acylboronates with O-alkylhydroxylamines – which are unreactive with KATs – was attributed to the nature