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The phospho-aldol reaction is a well-known and increasingly exploited synthetic process for the construction of phosphorus-carbon bonds. The reaction, essentially a base-catalysed addition reaction between a hydrogen-phosphonate ester and a carbonyl substrate, affords alpha-(α)-functionalised phosphonate esters. Such molecular scaffolds offer considerable scope in medicinal chemistry as the basis...
A number of complexes have been prepared and characterised which contain [3aS-[2(3'aR*,8'aS*),3a,8a]]-methylene-bis[3a,8a-dihydro-8H-indeno[1,2-d]oxa zole (BOX-H) and [3aS-[2(3'aR*,8'aS*),3a,8a]]-2,2'-(2,6-pyridinediyl)bis[3a,8a-dihydro-8H-ind eno[1,2-d]oxazole (Py-BOX) ligand frameworks. Single crystal X-ray analyses are reported on five compounds including one of the ligands themselves. The reported...
Chiral salcyan complexes of aluminium are effective air and water tolerant enantioselective catalysts for the hydrophosphonylation of carbonyls. Complexes of the form [(R,R)-salcyan]AlX (X=OH, OR) result in product enantioselectivity changes (Δee) of ca. 100% compared to those returned in the presence of related complexes [(R,R)-salcyen]AlX even though they both possess a chiral ligand framework with...
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