Reductive Coupling of Aromatic Dialkyl Acetals Using the Combination of Zinc and Chlorotrimethylsilane in the Presence of Potassium Carbonate
作者:Bunpei Hatano、Keita Nagahashi、Shigeki Habaue
DOI:10.1246/cl.2007.1418
日期:2007.12.5
The treatment of aromatic acetals with zinc and chlorosilane in the presence of potassium carbonate in toluene brought about facile and effective reductive coupling to give the corresponding coupling products.
The electrochemical oxidation of methanol and ethanol in the presence of trans-stilbene, cis-stilbene, norbornene, and styrene has been studied. The major gaseous and nongaseous products have been identified and determined, and the corresponding dimethoxylated derivatives and diethoxylated derivatives have been obtained in fairly high yields. The main path by which these products may have arisen has
Intermolecular photoreactions of tetracyanobenzene (TCNB) with benzyl cyanide (BzCN), benzyl alcohol (BzOH) and various others were investigated in the solid state (cocrystal) and in solution. The new solid-state photocoupling reaction found for the cocrystal TCNB·BzCN, giving a stilbene derivative followed by the solution isomerization into an isoindole derivative, is a very limited reaction. On the other
1,2-Bis-(trialkylsilyl)ethanes: Synthons for vicinal dications?
作者:John M. Porter、Xiangyang Xuan、Burchelle Blackman、Daniel Hsu、Albert J. Fry
DOI:10.1016/s0040-4039(97)01770-x
日期:1997.10
Anodic oxidation of 1,2-bis-(trimethylsilyl)-1,2-diphenylethane in methanol affords a 65:35 mixture of 1,2-dimethoxy-1,2-diphenylethane (dl:meso = 10:1 and diphenylacetaldehyde dimethylacetal. The results can be interpreted in terms of a 1,2-diaryl-2-methoxyethyl cation, which can undergo either nucleophilic attack by solvent or rearrangement to a 2,2-diaryl-1-methoxyethyl cation. Experiments testing