ONE-POT OXIDATION OF AZOMETHINE COMPOUNDS INTO ARENECARBOXYLIC ACIDS
摘要:
Aromatic azomethine compounds, such as aldazines 1, aldoximes 7 and tosylhydrazones 8 oxidized with 30% hydrogen peroxide in the presence of poly(bis-1,2-phenylene) diselenide (6) as catalyst produce arenecarboxylic acids 2 mostly in high to excellent yields. The presented one-pot procedure has a synthetic value.
The catalytic olefination reaction of aldehydes and ketones with CBr3CF3
作者:Valentine G. Nenajdenko、Georgy N. Varseev、Alexey V. Shastin、Elisabeth S. Balenkova
DOI:10.1016/j.jfluchem.2005.03.020
日期:2005.6
The new approach of catalytic olefination reaction (COR) has been used to convert aromatic and aliphaticaldehydes and ketones to 2-bromo-3,3,3-trifluoroprop-1-enes by the treatment of corresponding hydrazones with CBr3CF3 under copper(I) catalysis conditions. The reaction proceeds stereoselectively, the target alkenes were obtained in good yields.
Reaction of CBrF2–CBrF2 with hydrazones of aromatic aldehydes
作者:Valentine G. Nenajdenko、Georgy N. Varseev、Vasily N. Korotchenko、Alexey V. Shastin、Elisabeth S. Balenkova
DOI:10.1016/j.jfluchem.2004.04.002
日期:2004.9
An olefination of hydrazones of aromatic aldehydes by CBrF2–CBrF2 under copper catalysis was investigated. In situ prepared aldehydes hydrazones were converted to (3-bromo-2,2,3,3-tetrafluoropropyl)arenes by reaction with CBrF2–CBrF2 in the presence of CuCl. Subsequent elimination of HF by sodium hydroxide resulted in stereospecific formation of fluorocontaining alkenes. Elimination proceeds stereoselectively