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Intermolecular reductive C-N cross coupling of nitroarenes and boronic acids by P(III) / P(V)=O catalysis

When approaching the synthesis of an aryl- or heteroaryl- amine most people would turn to a suitable transition metal (Pd, Cu or Ni) catalysed C-N cross-coupling reaction- most likely a Buchwald-Hartwig reaction, or, if this has limited success, Ullmann or Chan-Evans-Lam couplings.1 Photoredox approaches using aryloxy amides as a source of amidyl radicals began a trend

Some Good News from the UK (let’s not mention Brexit)

At last some good news from the UK, we are delighted to hear that the Pfizer Sandwich UK site is recruiting!  They are seeking new colleagues to join their Chemical R&D department in a number of areas to support their rapidly growing global portfolio.  These roles have been created to assist acceleration of early Active

Xenon- the light at the end of the tunnel

Xenon (Xe, Element 54) Xenon, from the Greek for ‘stranger’ is a colourless, odourless group 18 noble gas. Discovered in 1898 in London by William Ramsay, xenon is produced commercially by the fractional distillation of liquid air and is isolated as a by-product of the cryogenic production of oxygen and nitrogen. The concentration in the

The Balz-Schiemann Reaction

Aryl- and heteroaryl- diazonium tetrafluoroborate salts, prepared by diazotization of an aniline in the presence of HBF4, are unique in that in many cases they are sufficiently stable to isolate. Thermal decomposition of these salts at elevated temperatures results in fluoro-dediazoniation and formation of the corresponding aryl or heteroaryl fluoride- the Balz-Schiemann reaction.1a,bRadiolabelled 18F compounds

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