Direct biocatalysed synthesis of first sulfur-, selenium- and tellurium- containing l-ascorbyl hybrid derivatives with radical trapping and GPx-like properties
Convenient Preparation of Benzylseleno‐ and Phenylselenoalkanoic Acids: Reagents for Synthesis of Organoselenium Compounds
作者:Aman Bhalla、Sitansh Sharma、Kuldip K. Bhasin、Shamsher S. Bari
DOI:10.1080/00397910601133540
日期:2007.3
Abstract An efficient and operationally simple route to benzylseleno‐ and phenylselenoalkanoic acids from ethyl benzyl/phenylselenoalkanoates is described. This involves preparation of ethyl benzyl/phenylselenoalkanoates as substrates by reaction of dibenzyl/diphenyl diselenide and sodium borohydride with ethyl chloroalkanoates in ethanol followed by basic hydrolysis and subsequent acidification.
作者:W. Russell Bowman、Peter T. Stephenson、Nicholas K. Terrett、Adrian R. Young
DOI:10.1016/0040-4020(95)00412-2
日期:1995.7
Radical cyclisation of sp3 carbon-centred radicals onto imines and hydrazones provides a new method for the synthesis of 5- and 6-membered ring nitrogen heterocycles. Cyclisation onto the electrophilic carbon of the C=N group and 5-exo stereoelectronic selectivity are the dominating mechanistic parameters. The C-centred radical intermediates were generated from benzeneselenyl precursors using Bu3SnH
Mimicking nature: The reversibleformation of self‐assembled nanostructures of selenium‐containing peptides can be controlled by redox triggers (see scheme, VC=vitamin C). As a consequence, the catalytic activity of these peptides is switchable. These results should lead to the development of nature‐mimicking smart materials with promising properties.