## Abstract __N__‐Alkyl‐5‐aminoisoquinolinium salts (**8a‐d**) are converted into indole‐4‐carboxaldehydes (**1a‐c**) on heating in a two phase alkyl acetate‐water system containing an excess of a 2:1 sodium bisulfite‐sodium sulfite mixture. 4‐Acetylindole **1e** is prepared in the same way from 1‐
Acid-catalyzed acylation of 4-alkyl-3-azapyrylium salts and the synthesis of 4-acylaminopyrylium salts
✍ Scribed by N. V. Shibaeva; S. V. Borodaev; I. A. Yudilevich; A. P. Knyazev; A. D. Dubonosov; A. I. Pyshchev; S. M. Luk'yanov
- Publisher
- Springer US
- Year
- 1991
- Tongue
- English
- Weight
- 395 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0009-3122
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## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
NucleophiLic acylation of 3,44ihydroisoquinoliniinolinium salts 3 with lithiated enol ethers 6, 7, and 8 or vinyl sulfides 14 leads to the adducts 4 9 , and 16, mpctively, in mostly excellent yields. Hydrolysis of 4 alTords 94-97% of the ketones 5, which are transformed by treatment with conc. hydro