نتایج جستجو برای: strecker reaction

تعداد نتایج: 412564  

Journal: :Asian Journal of Organic Chemistry 2021

The cover art illustrates the phase-transfer catalysis effective for asymmetric Strecker reaction of ketoimines with potassium cyanide under solid-liquid biphasic conditions. Chiral 1,2,3-triazolium ion featuring prominent hydrogen-bond donating and anion-binding capabilities allows establishment a highly efficient enantioselective process preparation sterically congested chiral α-amino nitrile...

Journal: :Journal of combinatorial chemistry 2005
Marcelo J Nieto Ashok E Philip Jacques H Poupaert Christopher R McCurdy

Spirohydantoins are considered privileged structures, making them attractive for the preparation of compound libraries with the potential for diverse biological activity. However, very few modifications of this scaffold have been reported to date. The spirohydantoin template was elaborated into a library of 168 compounds through a two-step solution-phase parallel synthesis starting from various...

Journal: :Food Chemistry 2021

The aim of this study was to increase the baked flavour low-acrylamide potato products. Strecker aldehydes and pyrazines make an important contribution products are formed alongside acrylamide in Maillard reaction. However, reaction can be directed favour aroma formation by selecting appropriate precursors intermediates based on fundamental chemistry involved. Selected were added dough prior ba...

Journal: :Food chemistry 2016
Rosa M Delgado Francisco J Hidalgo Rosario Zamora

The Strecker-type degradation of phenylalanine in the presence of 2-pentanal and phenolic compounds was studied to investigate possible interactions that either promote or inhibit the formation of Strecker aldehydes in food products. Phenylacetaldehyde formation was promoted by 2-pentenal and also by o- and p-diphenols, but not by m-diphenols. This is consequence of the ability of phenolic comp...

Journal: :Food chemistry 2014
Biniam T Kebede Tara Grauwet Stijn Palmers Liesbeth Vervoort Reinhold Carle Marc Hendrickx Ann Van Loey

To get deeper insight into the effect of high pressure high temperature (HPHT) processing on the volatile fraction of carrots, differently coloured cultivars exhibiting orange, purple, red and yellow hues were investigated. The impact of HPHT sterilisation was compared with thermal sterilisation based on equivalent microbiological inactivation. The results of this study demonstrated HPHT steril...

Journal: :Organic & biomolecular chemistry 2014
Margherita Barbero Silvano Cadamuro Stefano Dughera Roberta Torregrossa

Two chiral derivatives of 1,2-benzenedisulfonimide, namely 4-methyl-3,6-bis(o-tolyl)-1,2-benzenedisulfonimide and 4,5-dimethyl-3,6-bis(o-tolyl)-1,2-benzenedisulfonimide, have been easily synthesized in good overall yields (respectively 34% and 41%) by means of an eleven-step synthetic protocol from commercially available 2-methyl-6-nitroaniline or 2,3-dimethyl-6-nitroaniline. 4,5-Dimethyl-3,6-b...

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