Selective transformation of nitriles into amides and carboxylic acids by an immobilized nitrilase
作者:Norbert Klempier、Anna de Raadt、Kurt Faber、Herfried Griengl
DOI:10.1016/s0040-4039(00)92623-6
日期:1991.1
Using an immobilized nitrilase from Rhodococcus sp. mild and selective hydrolysis of nitriles can be achieved even in the presence of acid or base sensitive groups under neutral conditions. This method is applicable to a broad range of substrates as exemplified by aliphatic, alicyclic, heterocyclic and carbohydrate type nitriles.
Acyclic nitronate olefin cycloaddition (ANOC): regio- and stereospecific synthesis of isoxazolines
作者:Liang Ma、Luyao Kou、Feng Jin、Xionglve Cheng、Suyan Tao、Gangzhong Jiang、Xiaoguang Bao、Xiaobing Wan
DOI:10.1039/d0sc05607c
日期:——
We report the first demonstrations of intra- and intermolecular acyclic nitronate olefin cycloaddition (ANOC) reactions that enable the highly efficient syntheses of isoxazolines bearing various functional groups. This general approach to accessing γ-lactone fused isoxazolines was hitherto unprecedented. The room temperature transformations reported herein exhibit wide substrate scopes, as evidenced
Conjugate Addition versus Cycloaddition/Condensation of Nitro Compounds in Water: Selectivity, Acid-Base Catalysis, and Induction Period
作者:Luca Guideri、Francesco De Sarlo、Fabrizio Machetti
DOI:10.1002/chem.201202698
日期:2013.1.7
react in water as in chloroform with electron‐deficient dipolarophiles to give condensation or conjugate addition products under basecatalysis. In general, high selectivity towards condensation is observed in water, with shorter induction periods than in chloroform. In water, condensations slowly occur even without base; kinetic profiles evidence the catalytic effect of the base, which should be related
Klempier, Norbert; Raadt, Anna de; Griengl, Herfried, Journal of Heterocyclic Chemistry, 1992, vol. 29, # 1, p. 93 - 95
作者:Klempier, Norbert、Raadt, Anna de、Griengl, Herfried、Heinisch, Gottfried
DOI:——
日期:——
Reactivity of [60]Fullerene with Primary Nitro Compounds: Addition or Catalysed Condensation to Isoxazolo[60]fullerenes
作者:Giacomo Biagiotti、Stefano Cicchi、Francesco De Sarlo、Fabrizio Machetti
DOI:10.1002/ejoc.201402990
日期:2014.12
addition products, depending on the nitrocompound and catalyst. The former product was favoured by the use of CuII in the catalytic system. Conversely, [60]fullerene underwent catalytic condensation, even in the absence of copper(II) salts, only with activatednitrocompounds and addition only with nitroalkanes in excess base. Note, the formal conjugated fullerene addition product was obtained in