acetate-acetic acid (1:1) was placed in a hydrogenator bottle, and after platinum oxide (3 mg) was added, the mixture was stirred at 60 °C for 10 h at 1 atm of hydrogen. The catalyst was removed by filtration, the filtrate was concentrated, and the residual solid was recrystallized from acetone to give 23: 5 mg (50%); mp 41-42 °C; mass spectrum, m/e 292 (M+);
Das aus Tetrahydrocarvon erhaltene Enamin (I) wird mit Methyl‐ und Ethyl‐vinyl‐keton (II) unter verschiedenen Bedingungen, z.B. unter Variation der Mengenverhältnisse und der Lösemittel, umgesetzt, und hierbei werden alle früher beschriebenen Reaktionsprodukte (III)‐(V) erhalten.
Grignardreagentien (I) reagieren mit Tosylazid (II) zu den Salzen (III), die in wäßrigem Alkali durch Ra‐Ni‐Legierung zu den Aminen (IV) reduziert werden.
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