Abstract Enantioselective intramolecular amidation of aliphatic sulfonamides was achieved for the first time by means of chiral carboxylatodirhodium (II) catalysts in conjunction with PhI (OAc) 2 and MgO in high yields and with enantioselectivities of up to 66%(Scheme 3, Table 1). The best results were obtained with [Rh 2 {(S)-nttl) 4] and [Rh 2 {(R)-ntv) 4] as catalysts ((S)-nttl=(αS)-α-(tert-butyl)-1, 3-dioxo-2H-benz [de] isoquinoline-2-acetato,(R)-nto=(αR)-α- ...
