stannylchlorides has also been reported. The high reactivity of the chlorine–tin bond is believed to be responsible for the activity of the reaction, assolvationinto a tightion paircould conceivably enhance the Lewis acidity of the tin center sufficiently to allow for a Type-I mechanism to ...
Herein, we report a formal cross-electrophile coupling of carboxylic acids with aryl or alkyl halides enabled by photoredox and nickel catalysis, and phosphoranyl radical synergistic chemistry, leading to concise synthesis of ketones (Fig. 1b). Fig. 2: Proposed mechanism. Mechanistic proposal for ...
It is shown that furyl ketone-formaldehyde oligomers are formed by a polycondensation mechanism involving hydroxymethyl groups and labile hydrogen atoms. It has been found that whether dimethylene ether of methylene structural units are formed predominantly in ketone-formaldehyde oligomers is dependent on ...
On the Mechanism of Pd(O) Catalyzed Formation of Oxazolidin-2-ones from Vinyl Epoxides The reaction of vinyl epoxides with isocyanates proceeded with overall retention of configuration. Barry,M.,Trost,... - 《Tetrahedron Letters》 被引量: 285发表: 1989年 A versatile synthesis of fluorinated urac...
Mechanism of imidazole and oxazole formation in [13C-2]-labelled glycine and alanine model systems In addition, model studies with α-dicarbonyl compounds, using ammonium carbonate as a source of ammonia and paraformaldehyde as a source of formaldehyde, ... VA Yaylayan,LJW Haffenden - 《Food ...
to steric effect and a lower acidity. Primary alkyl amines bearing one or more chiral moieties underwent α-C−H allylic alkylation to afford the corresponding chiral amines3ap-bawith high diastereoselectivities. Functional groups, such as acetal (for3ae), lactam (for3af), NHBoc (for3ak-...
Both intermediates were found to partake in sequential reactions resulting in the formation of H2O and CO2 via formaldehyde. 展开 关键词: micro-/mesoporous composite nanocubic silica Pt-Mn bimetallic center methyl ethyl ketone catalytic oxidation DFT calculation activation mechanism DOI: 10.1021/acscatal...
At 326 K, in addition to these products, appreciable quantities of acetaldehyde, acetone, and biacetyl were detected. Quantum yields were determined using acetone and pentan-3-one as actinometers. A conventional mechanism is able to explain most of the experimental data. At 326 K, the ...
关键词: Methyl ethyl ketone Acetaldehyde Mechanism of photocatalytic degradation Annular photocatalytic reactor modelling Kinetic parameters DOI: 10.1016/j.jphotochem.2007.04.002 被引量: 42 年份: 2007 收藏 引用 批量引用 报错 分享 全部来源 求助全文 全文购买 Elsevier 国家科技图书文献中心 (权威机构) ...
Poly(ether ketone) Pendant groups have large effect onchain mobility. The adamantine group acts as a “fish hook” which catches on to any nearby molecule and reduces chain mobility. The magnitude of this effect is related to the size of the pendant functional group-large groups (eg. ...