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.
A novel direct synthesis of (2,2-difluorovinyl)benzenes from aromatic aldehydes
作者:Valentine G Nenajdenko、Georgy N Varseev、Vasily N Korotchenko、Alexey V Shastin、Elisabeth S Balenkova
DOI:10.1016/s0022-1139(03)00199-4
日期:2003.11
A novel catalytic approach to (2.2-difluorovinyl)benzenes has been developed. It was found that hydrazones of aromatic aldehydes generated in situ could be converted to the corresponding (2,2-difluorovinyl)benzenes by catalytic olefination reaction (COR) with dibromodifluoromethane in the presence of CuCl. (C) 2003 Published by Elsevier B.V.
Monohydrocyanation of Symmetrical Azines Using Potassium Hexacyanoferrate(II) as an Environmentally Friendly Cyanide Source
作者:Zheng Li、Xiaochun Hu、Hongbo Li、Jingya Yang
DOI:10.1055/s-0033-1339133
日期:——
The monohydrocyanation of symmetrical azines to synthesize -hydrazinonitriles using potassium hexacyanoferrate(II) as cyanide source and benzoyl chloride as a promoter under catalyst-free conditions is described. The advantages of this protocol are the environmentally friendly cyanide source, high yield, and simple work-up procedure.