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A re-investigation of the acid-catalyzed cyclization of δ-hydroxyamides

✍ Scribed by Denis M. Bailey; C.George DeGrazia

Publisher
Elsevier Science
Year
1970
Tongue
French
Weight
145 KB
Volume
11
Category
Article
ISSN
0040-4039

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✦ Synopsis

During an investigation involving the synthesis of various ksoquinoline derivatives we bad cause to use the procedure of Hauser e& a& (If to prepare interaediate dihgdroisocarbostyrils beginning.with III&. Li / CONHR R'COR" *p4

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Investigations of the chemical cyclization of polyamic acid, obtained from pyromellitic anhydride and benzidine, were performed. Using various dehydrating agents like acetyl chloride, acetic anhydride, triftuoracetic anhydride and the system acetic anhydride:pyridine (5: 1), different ratios of the