Results 111 to 120 of about 14,155 (281)
Environmental Identification of Novel Enzymes for Polyurethane and Polyamide Degradation
Angewandte Chemie International Edition, EarlyView.Heteroatom‐containing plastics such as polyurethanes and nylons are produced at scale yet remain largely unrecycled. Biocatalysts offer a promising route to depolymerization under mild conditions. Here, we present a screening platform for the discovery of novel polyurethane‐ and nylon‐degrading enzymes from environmental samples and demonstrate ...
Malthe Kjær Bendtsen +17 more
wiley +1 more source
Photochemical Allylation of Aldehydes or Alkanes with Vinyl Cyclopropanes
ChemistryEuropeVinyl cyclopropanes are useful linchpins for the synthesis of more complex scaffolds. In this work, we present an acylation or alkylation protocol of donor–acceptor vinyl cyclopropanes, employing tetra‐n‐butylammonium decatungstate as the photocatalyst ...
Naya A. Stini, Christoforos G. Kokotos
doaj +1 more source
SYNTHESIS OF NITRILES BY FUSION OF AMIDES WITH AMMONIUM SULPHAMATE
, 1950 It has been found that a good yield of nitriles can be obtained by fusing amides with ammonium sulphamate. The method has been applied successfully to simple aliphatic and aromatic amides.
core +1 more source
, 2017 An efficient palladium-catalyzed aerobic oxidative cyclization has been developed to synthesize a variety of pyrrolizidine and indolizidine derivatives from simple aliphatic alkenyl amides in moderate to good yields.
Liu Ye, Kai-Yip Lo, Dan Yang
core +1 more source
Cobalt-Catalyzed Cyclization of Aliphatic Amides and Terminal Alkynes with Silver-Cocatalyst
, 2015 A new method of cobalt-catalyzed synthesis of pyrrolidinones from aliphatic amides and terminal alkynes was discovered through a C–H bond functionalization process on unactivated sp3 carbons with the silver cocatalyst using a bidentate auxiliary. For the
Zhanxiang Liu (538503) +5 more
core +1 more source
, 2001 504-507The synthesis of amides 2 from the corresponding aromatic acids and aliphatic amines in the presence of catalytic amount of p-toluenesulfonic acid has been reported. The reactions are accelerated with microwave irradiation under solvent-free
Hajipour, Abdol Reza, Ghasemi, Majid
core
Copper-Catalyzed Ligand-Free Amidation of Benzylic Hydrocarbons and Inactive Aliphatic Alkanes
, 2015 An efficient copper-catalyzed amidation of benzylic hydrocarbons and inactive aliphatic alkanes with simple amides was developed. The protocol proceeded smoothly without any ligand, and a wide range of N-alkylated aromatic and aliphatic amides ...
Hui-Ting Zeng (1538098) +1 more
core +1 more source
Sustainable Pd‐Catalyzed Aminations “on Dirty Water”
Angewandte Chemie International Edition, EarlyView.Aminations, done safely yet neat, and therefore, quickly, using low levels of Pd, in “dirty water” that must contain 30% KOH; not NaOH, and not at 5%,10%, 20%, 40%, or 50% KOH. Moreover, no base sensitivity of functional groups! Very cool. Thank you, Nature.
Erfan Oftadeh +4 more
wiley +1 more source
Journal of Applied Polymer Science, EarlyView.Polyurethane films were prepared from andiroba (Carapa guianensis) and buriti (Mauritia flexuosa) oil‐derived polyols, emphasizing their potential as bio‐based materials. UV–Vis analysis indicates the retention of carotenoid‐related chromophoric features within the polymer matrix.
João A. P. da Silva +5 more
wiley +1 more source
Journal of Applied Polymer Science, EarlyView.The study assesses dye impacts on PA66/wool recycling via selective PA66 dissolution in calcium chloride–ethanol–water and water reprecipitation. Acid dyes migrate into solvent, yielding color‐free, melt‐spinnable PA66 and reusable wool. Metal‐complex dyes remain, altering PA66 melt viscosity and requiring extraction or repurposing.
Lukas Vonbrül +8 more
wiley +1 more source