SUBSTITUENT-DEPENDENT ASYMMETRIC INDUCTION IN THE RING TRANSFORMATIONOF 2,3-DIHYDROIMIDAZO[2,1-A]PHTHALAZIN-4-IUM-6-OLATES EFFECTED BY ACETIC AND PROPIONIC ANHYDRIDES

Authors
SZABO A CSAMPAI A KORMENDY K BOCSKEI Z
Citation
A. Szabo et al., SUBSTITUENT-DEPENDENT ASYMMETRIC INDUCTION IN THE RING TRANSFORMATIONOF 2,3-DIHYDROIMIDAZO[2,1-A]PHTHALAZIN-4-IUM-6-OLATES EFFECTED BY ACETIC AND PROPIONIC ANHYDRIDES, Tetrahedron, 53(20), 1997, pp. 7021-7034
Citations number
19
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Tetrahedron → ACNP
ISSN journal
00404020
Volume
53
Issue
20
Year of publication
1997
Pages
7021 - 7034
Database
ISI
SICI code
0040-4020(1997)53:20<7021:SAIITR>2.0.ZU;2-S
Abstract
On the effect of acetic and propionic anhydrides 2,3-dihydroimidazo[2, 1-a]phthalazin-4-ium-6-olates (1c-j) underwent ring transformation (1 --> 7.8). Alternative mechanisms are applied to reason the characteris tic substituent-dependent asymmetric induction observed for tile trans formations of the 2-monosubstituted precursors. The structures of prod ucts were determined by IR MS, H-1- and C-13-NMR (1D- and 2D) measurem ents supported by single crystal X-ray analysis. (C) 1997 Elsevier Sci ence Ltd.