Reactions with Stilbenes and Related Derivatives. Part I. Reactions of 1, 2-Dihalogeno-1, 2-bis-(4-methoxyphenyl)ethanes with Alcohols
作者:Wadie Tadros、Raouf Ramzi Tadros、Moheb Sadek Ishak
DOI:10.1002/hlca.19760590603
日期:——
The reaction of 1, 2-dibromo-1, 2-bis(4-methoxyphenyl)ethane with alcohols was associated with rearrangement to give the corresponding bis(4-methoxyphenyl)acetals. In boiling ethylene glycol 4,4′-dimethoxy-deoxybenzoin was also obtained due to an aldehyde-ketone rearrangement. 4,4′-Dimethoxybenzophenone was also formed being apparently derived from the acetals. The mechanism of formation of the acetals
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