报道了一种简单有效的系统,用于腈的水合和 α-氘化以形成酰胺、α-氘化腈和 α-氘化酰胺,该系统由能够进行金属-配体合作的地球丰富锰的单钳络合物催化。该反应具有选择性并且可以耐受多种官能团,从而以中等至良好的产率得到相应的酰胺。将溶剂从叔丁醇改为甲苯并使用 D 2 O 导致以高选择性形成 α-氘代腈。此外,可以一步直接从腈和 D 2 中获得 α-氘化酰胺O 在四氢呋喃中。初步的机理研究表明,这些转变通过金属-配体协同途径促进了腈的活化,生成锰酮亚胺和烯酰胺钳络合物作为进一步转变的关键中间体。
Ruthenium-catalyzed selective α-deuteration of aliphatic nitriles using D<sub>2</sub>O
作者:Varadhan Krishnakumar、Chidambaram Gunanathan
DOI:10.1039/c8cc03971b
日期:——
Selective catalytic α-deuteration of aliphatic nitriles usingdeuterium oxide as a deuteriumsource is reported. A PNP–ruthenium pincer complex catalyzed the α-deuteration of aliphatic nitriles including acetonitrile. Efficient deuteration occurred with a low catalyst load (0.2 to 0.5 mol%) and under mild conditions. A [2+2] cycloadduct formation from nitrile functionality and a deprotonated catalytic
A simple and efficient system for the hydration and α-deuteration of nitriles to form amides, α-deuterated nitriles, and α-deuterated amides catalyzed by a single pincer complex of the earth-abundant manganese capable of metal–ligand cooperation is reported. The reaction is selective and tolerates a wide range of functional groups, giving the corresponding amides in moderate to good yields. Changing
报道了一种简单有效的系统,用于腈的水合和 α-氘化以形成酰胺、α-氘化腈和 α-氘化酰胺,该系统由能够进行金属-配体合作的地球丰富锰的单钳络合物催化。该反应具有选择性并且可以耐受多种官能团,从而以中等至良好的产率得到相应的酰胺。将溶剂从叔丁醇改为甲苯并使用 D 2 O 导致以高选择性形成 α-氘代腈。此外,可以一步直接从腈和 D 2 中获得 α-氘化酰胺O 在四氢呋喃中。初步的机理研究表明,这些转变通过金属-配体协同途径促进了腈的活化,生成锰酮亚胺和烯酰胺钳络合物作为进一步转变的关键中间体。
Nachbargruppeneffekte bei der massenspektrometrischen Fragmentierung: N-Acetyl-?-Phenylalkylamine. 20. Mitteilung �ber das massenspektrometrische verhalten von stickstoffverbindung
作者:Ren� Wild、Manfred Hesse
DOI:10.1002/hlca.19740570219
日期:——
The mass spectral behaviour of the difunctional alkane N-acetyl-4-phenyl-butylamine (3) was investigated. The main fragmentation of compound 3 is caused by the interaction on the two functional groups, which could be shown by comparison of the corresponding monofunctional compounds n-butylbenzene (4) and N-acetyl-n-butylamine (5). On the bases of high resolution data, the analyses of metastable transitions