Cyclodextrin mediated solvent-free enantioselective photocyclization of N-alkyl pyridones
摘要:
Irradiation of N-methyl pyridone and N-ethyl pyridone included in beta-cyclodextrin yields the pbotocylized product, chiral 2-azabicyclo [2.2.0]-hex- 5-en-3-ones, in similar to60% enantiomeric excess. The inclusion complex is readily made by mechanically mixing the host beta-cyclodextrin and the guest pyridone. (C) 2002 Elsevier Science Ltd. All rights reserved.