doi:10.1039/c4cy01533aengAsenjo, A.Viguri, F.Lamata, M.PilarRodríguez, R.Carmona, M.Oro, L. A.Carmona, D.Asymmetric 1,3-dipolar cycloaddition reactions between enals and nitrones catalysed by half-sandwich rhodium or iridium diphosphane complexesART-2015-89536The aqua complexes ¿(¿5-C5Me5)M¿PP*)¿H2O)]¿SbF6]2 (M = Rh, Ir; PP* = chiral diphosphane) have been tested as catalysts for the asymmetric 1,3-dipolar cycloaddition of nitrones to a,ß-unsaturated aldehydes. Quantitative conversions with very high regioselectivity, perfect endo selectivity and excellent enantioselectivity (up to 99% ee) were achieved. The stereochemical outcome was analyzed on the basis of the stereoelectronic properties of the intermediate enal complexes of the formula ¿(¿5-C5Me5)M¿PP*)¿enal)]¿SbF6]2.2015http://zaguan.unizar.es/record/8616010.1039/c4cy01533ahttp://zaguan.unizar.es/record/86160oai:zaguan.unizar.es:86160info:eu-repo/grantAgreement/ES/MINECO/CTQ2012-32095Catalysis Science and Technology 5, 4 (2015), 2460-2466All rights reservedhttp://www.europeana.eu/rights/rr-f/info:eu-repo/semantics/openAccess