Stereoselective synthesis and functionalization of 4-heterosubstituted β-lactams
摘要:
Polyfunctionalized beta-lactams were prepared with high stereoselectivity in an efficient manner. A palladium-catalyzed [2+2] carbonylative cycloaddition of allyl bromide with heteroaryliden-anilines afforded 2-azetidinones N-phenyl substituted, with an heteroaryl moiety linked at the C-4 carbon, and an alkenyl group at the C-3 carbon. The C-3 and the C-4 positions could be further functionalized inserting alkyl and hydroxyl groups in the azetidinone ring, through the generation of a stable azetidinyl anion then captured by various electrophiles. (c) 2005 Elsevier Ltd. All rights reserved.
Stereoselective synthesis and functionalization of 4-heterosubstituted β-lactams
作者:Luigino Troisi、Ludovico Ronzini、Catia Granito、Luisella De Vitis、Emanuela Pindinelli
DOI:10.1016/j.tet.2005.11.007
日期:2006.2
Polyfunctionalized beta-lactams were prepared with high stereoselectivity in an efficient manner. A palladium-catalyzed [2+2] carbonylative cycloaddition of allyl bromide with heteroaryliden-anilines afforded 2-azetidinones N-phenyl substituted, with an heteroaryl moiety linked at the C-4 carbon, and an alkenyl group at the C-3 carbon. The C-3 and the C-4 positions could be further functionalized inserting alkyl and hydroxyl groups in the azetidinone ring, through the generation of a stable azetidinyl anion then captured by various electrophiles. (c) 2005 Elsevier Ltd. All rights reserved.