Experiments towards the Preparation of 6‐Hydroxy‐,6‐Methoxy‐, and 6‐(hydroxyphenyl)‐2,3‐dihydro‐1,4‐diazepinium Salts and 1,2‐Dihydro‐5‐(Hydroxyphenyl)‐2‐oxopyrimidinium Salts
- 15 August 1986
- journal article
- research article
- Published by Wiley in European Journal of Organic Chemistry
- Vol. 1986 (8) , 1368-1379
- https://doi.org/10.1002/jlac.198619860807
Abstract
The preparation of a number of 2,3‐dihydro‐6‐(hydroxyphenyl)‐1,4‐diazepinium salts (11c – f) and of 1,2‐dihydro‐5‐(hydroxyphenyl)‐2‐oxopyrimidinium salts (17a, b) from 3‐(hydroxyphenyl)vinamidinium salts (10b, c) is described. Attempted preparation of a 3‐(2‐hydroxyphenyl)vinamidinium salt gave instead a mixture of formyl‐substituted benzofuranones (15 and 16). Attempted preparation of 2,3‐dihydro‐6‐hydroxy‐1,4‐diazepinium salts (1a – c) provided products other than diazepinium salts, but 2,3‐dihydro‐6‐methoxy‐1,4‐diazepinium salts (7a, b) were prepared.Keywords
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