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Triphenylphosphine Oxide- Waste Not, Want Not

Love it or hate it, triphenylphosphine oxide (TPPO, Figure 1) is something we all encounter at some point during our chemistry careers. Most of the time it’s just a by-product from well-established and widely used process such as the Mitsunobou, Wittig, Staudinger, Appel and Corey-Fuchs reactions.1 I remember having a vial full of the white,

The sun never sets on synthetic methodology- redox neutral organocatalytic Mitsunobu reactions

One of the things I enjoy most about science, and chemistry in particular, is that even processes that are well understood and used routinely, almost without thinking about them, can be re-invented. The allure of discovering new reactions and being at the forefront of a completely new area of research attracts many academics and students,

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

Heterocyclic phosphonium salts- powerful intermediates for pyridine coupling

Heterocyclic phosphonium salts- powerful intermediates for pyridine coupling:- I’ve always had a keen interest in phosphorus chemistry and have followed the work of the McNally group at Colorado state on heterocyclic phosphonium salts closely. In late 2016 a paper describing synthesis and application of the so called HetPhos salts for C4 (or C2) functionalisation of

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