Diastereoselective Ti-mediated preparation of bicyclic aminocyclopropanes from N-alkenyl amides
摘要:
Intramolecular Ti-mediated alkene-amide couplings of a range of N-alk-3-enyl amides fitted with a substituent at the homoallylic position are described. CF3-substituted compounds are suitable substrates and bicyclic aminocyclopropanes bearing a CF3 group can be prepared in this way. Good diastereoselectivities can be observed depending on the substitution pattern, and best results are obtained in diethyl ether rather than in THF. (C) 2009 Elsevier Ltd. All rights reserved.
Diastereoselective Ti-mediated preparation of bicyclic aminocyclopropanes from N-alkenyl amides
摘要:
Intramolecular Ti-mediated alkene-amide couplings of a range of N-alk-3-enyl amides fitted with a substituent at the homoallylic position are described. CF3-substituted compounds are suitable substrates and bicyclic aminocyclopropanes bearing a CF3 group can be prepared in this way. Good diastereoselectivities can be observed depending on the substitution pattern, and best results are obtained in diethyl ether rather than in THF. (C) 2009 Elsevier Ltd. All rights reserved.