Synthesewege zu 3-substituierten Indol-2-onen

✍ Scribed by Johannes Reisch; Michael Müller; Henning Labitzke

• Publisher: John Wiley and Sons
• Year: 1984
• Tongue: English
• Weight: 436 KB
• Volume: 317
• Category: Article
• ISSN: 0365-6233
• DOI: 10.1002/ardp.19843170713

✦ Synopsis

3-Substituierte Indol-2-one 639

The reaction residue was suitably purified and N-formyl and N-demethyl-compound were isolated as previously described'). Physical and spectral data of the N-formyl derivatives lb, 2b and 3b are reported in table 2. The structure of products l c and 2c was established comparing its NMR spectrum with the one of authentic samples obtained from acid hydrolysis" of the corresponding N-formyl derivatives, l b and 2b, resp. Radicals 2,2,4,4 tetramethylpipendine N-oxyl (Id), and 9-azabicyclo[3.3. llnonane N-oxyl(2d), were isolated as deep red volatile crystals with a musty odor. These products were recrystallized from pentane and sublimed; physical and spectral data, reported in table 2, are identical to those rep~rted~.~).