Direct synthesis of pyrrolo[2,1-a]isoquinolines by 1,3-dipolar cycloaddition of stabilized isoquinolinium N-ylides with vinyl sulfonium salts
摘要:
A direct and efficient synthesis of 2,3-unsubstituted 1-acylpyrrolo[2,1-a]isoquinolines is described. The 1,3-dipolar cycloaddition of stabilized isoquinolinium N-ylides with vinyl sulfonium salts features simple experimental procedures, mild conditions, and moderate to good yields. (C) 2013 Elsevier Ltd. All rights reserved.
Generation of pyrrolo[2,1-a]isoquinoline derivatives from N-ylides: Synthetic control and structural characterization
作者:Florea Dumitrascu、Mino R. Caira、Emilian Georgescu、Florentina Georgescu、Constantin Draghici、Marcel Mirel Popa
DOI:10.1002/hc.20740
日期:2011.11
New pyrrolo[2,1-a]isoquinolines were obtained by two one-pot procedures via 1,3-dipolar cycloaddition between the isoquinolinium N-ylides and symmetrical acetylenic dipolarophiles, avoiding the formation of dihydro intermediates. For structural comparison, the dihydro derivatives obtained by a classical two-stage reaction were characterized by NMR and X-ray crystallography, allowing complete stereochemistry