Keywords: Iridium / Allyl complexes / NMR spectroscopy / Allylic substitution / Asymmetric catalysis Ir-catalysed allylic alkylations of enantiomerically enriched monosubstituted allylic acetates proceed with up to 87% retention of configuration using P(OPh) 3 as ligand. High regioand enantioselectivity of up to 86% ee in asymmetric allylic alkylations of achiral or racemic substrates is achieved with monodentate phosphorus amidites as ligands. Lithium N-tos-

Ir-catalysed allylic alkylations of enantiomerically enriched monosubstituted allylic acetates proceed with up to 79% retention of configuration using P(OPh) 3 as ligand; further evidence supports the assumption of s-allyl complexes as intermediates, and high regio-and enantioselectivity in asymmetric allylic alkylations of achiral or racemic substrates is achieved with phosphorus amidites as ligands.

Monodentate phosphorus amidites derived from 2,2Ј-binaphthol and a variety of chiral amines were employed as ligands in Ir I -catalysed allylic alkylations of unsymmetrically substituted allylic acetates. The enantio-and regioselectivities of these reactions were investigated. Phosphorus amidites of bulky secondary chiral amines induced enantioselectivities of up to 94% ee in reactions of linear substrates. Phosphorus

A new method for the straightforward synthesis of 2-amino-[1,2,4]triazolo[1,5-a]pyridines and derivatives is presented. The target products are synthesized in high yields from guanidylpyridines and analogues via copper-catalyzed N-N coupling. The present methodology shows a wide scope, tolerating not only different substituents on the pyridine ring but also different heterocylic rings such as pyrazines, pyrimidines, and pyridazines.

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