Selenocarbonyl synthesis using Woollins reagent.
Abstract. This work was funded by EPSRC(PhP(Se)(mu -Se))(2) selenates secondary and tertiary amides to the corresponding selenoamides in 30-70% yields at 130 degreesC in toluene and indolizine-3-aldehydes to selenoaldehydes in 40-59% yield at 25 degreesC.
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Derek's work on phosphorus-sulfur and phosphorus-selenium chemistry resulted in Woollins' reagent that has been manufactured on a commercial scale for use in organic synthesis. Professor Woollins worked on the catalytic removal of hydrogen sulfide from air which is of considerable industrial and environmental significance, (13) and has done a range of work on molecular scaffolding.
General Characteristics 2,4-Diphenyl-1,3-diselenadiphosphetane-2,4-diselenide is called the Woollins’ reagent. In a similar way that the Lawesson’s reagent is used to convert carbonyl groups to the corresponding thiocarbonyl groups, the Woollins' reagent is used to prepare selenocarbonyl compounds. General References Woollins, J.
Prof J. Derek Woollins Vice Principal (Research) and Provost, Professor of Synthetic Chemistry. Professor Woollins currently holds the position of Vice Principal (Research) and Provost of St Leonards College at the University of St Andrews where he is a Professor of Synthetic Chemistry College Gate Office Tel: 01334 463202.
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As a part of our ongoing projects focused on the synthesis and characterisation of selenium-containing heteroatom systems herein we report the formation of new selenoureas and diselenazoles via the reactions of aroyl chlorides, potassium selenocyanate, and the bulky amine 1,2,4-tri-tert-butylaniline, the further selenation by Woollins Reagent.
Woollins' reagent. 13 likes. Woollins' reagent is an organic compound containing phosphorus and selenium. Analogous to Lawesson's reagent, it is used.
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In the subsequent preparation we replaced it with the Woollins' reagent (see Fig. 3 for its chemical structure). This compound is a popular reagent in organic chemistry used in the synthesis of selenium-containing heterocyclic compounds, ,. However, till now it has never been employed as a source of selenium in the preparation of.
Woollins’ reagent (WR).17 Woollins’ reagent is a selenium analogue of the Lawesson’s reagent. It allows the safe introduction of selenium. The reaction to replace oxygen with selenium was conducted in toluene under nitrogen and with HMDSO as a catalyst (Scheme 1). Scheme 1. Synthesis of thio- and selenodeferiprone.
Woollins' reagent is an organic compound containing phosphorus and selenium. Analogous to Lawesson's reagent, it is used mainly as a selenation reagent. It is named after Professor.
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The Bradford assay is a standard quantitative method for the determination of protein concentrations. Bradford reagent used in the assay contains Coomassie Blue which produces a characteristic blue colour upon binding to proteins in solution (Bradford, Anal.
Derek Woollins’ profile on The Conversation. My major interests are in the synthesis and study of main group sulfur, selenium and phosphorus heterocycles.
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The aim of the current investigation is to investigate the acid-catalysed Fischer esterification mechanism underlying the synthesis of the anaesthetic benzocaine using p-aminobenzoic acid and ethanol in excess. The resulting synthesised compound was subject to IR and melting point analyses in order to determine the identity and indeed the purity of the obtained sample.