Studies on the oxidation of enamines with molecular oxygen 2. Oxidation of 1‐Amino But‐1‐enes

Silylene and Germylene Intermediates in the Reactions of Silole and Germole Dianions with N,N′‐Di‐tert‐butylethylenediimine

“…Evidently 15 arises via C-oxidation of spirocyclo-enediamine 3 (Scheme 8). Similar oxidation of enamines, enhanced in presence of molecular sieves was described previously by Blau et al [17][18][19] Eur (15) shown with 50 % probability thermal ellipsoids. The germanium-nitrogen bond in 3b (E = Ge) is less stable than a silicon-nitrogen bond and rapidly decomposes in the presence of air to give the cyclo-trigermoletrioxane 16 (Scheme 8), identified by X-ray crystallography and 1 H, and 13 C NMR analysis.…”

Pd-Catalyzed Synthesis of Aryl Amines via Oxidative Aromatization of Cyclic Ketones and Amines with Molecular Oxygen

“…The best results were obtained with anisic acid and benzoic acid which gave the desired product in 78% yield (Table , entries 6 and 7). In contrast, the addition of strong acids (Table , entries 8 and 9) resulted in a too rapid release of the enamine which was decomposed before it could be converted efficiently by the catalyst. The yield was further improved by lowering the catalyst loading (Table , entry 10), and under optimized conditions (Table , entry 11), 3aa was detected in 93% yield.…”

Studies on the oxidation of enamines with molecular oxygen. III. Oxidation of some amino styrenes

“…In the publications [l] and [2] we have described the results of the oxidation of aliphatic enamines with molecular oxygen. We showed that only products of an oxidative attack at the C = C double bond are formed and no products of an allylic oxidation, which are the main products in the oxidation of aliphatic and cycloaliphatic olefines.…”