Ruthenium-catalysed conversion of oxime ethers into nitriles
作者:Naveen Anand、Nathan A. Owston、Alexandra J. Parker、Paul A. Slatford、Jonathan M.J. Williams
DOI:10.1016/j.tetlet.2007.09.028
日期:2007.10
The conversion of oxime ethers into nitriles has been achieved under neutral conditions using Ru(CO)(PPh3)3H2 and the bidentate ligand Xantphos as the catalyst.
使用Ru(CO)(PPh 3)3 H 2和二齿配体Xantphos作为催化剂,在中性条件下实现了肟醚向腈的转化。
Ti-mediated direct and highly stereoselective Mannich reactions between esters and oximeethers
The first general method of direct and highly stereoselective Ti-mediated Mannich reaction between three types of simpleesters and E and Z mixtures of oxime ethers (aliphatic and aromatic) is accomplished.
Regiospecific Synthesis of Substituted 2-Nitrobenzaldehydes from Benzaldehydes through Palladium-Catalyzed Chelation-Assisted C-H Nitration
作者:Wei Zhang、Degui Wu、Jian Zhang、Yunkui Liu
DOI:10.1002/ejoc.201402451
日期:2014.9
A regiospecific synthesis of substituted 2-nitrobenzaldehydes from substituted benzaldehydes has been developed that involves a three-step process with palladium-catalyzed chelation-assisted C–H nitration as the key step. In the process, O-methyl aldoxime serves as a removable directing group for the palladium-catalyzed ortho-nitration of substituted benzaldoximes and it can be removed in subsequent
A Short Total Synthesis of Benzophenanthridine Alkaloids via a Rhodium(III)-Catalyzed C–H Ring-Opening Reaction
作者:Narasingan Aravindan、Masilamani Jeganmohan
DOI:10.1021/acs.joc.1c01612
日期:2021.11.5
The biologically important naturally available benzophenanthridines were prepared efficiently in three steps with overall good yields. A new synthetic methodology involving a rhodium(III) catalyzed redox-neutral ring-opening of 7-azabenzonorbornadienes with aromatic aldoximes is developed to synthesize the target molecules. The developed C–H ring-opening reaction is highly diastereoselective and compatible
Imidazo-containing compounds (e.g., imidazoquinolines, imidazonaphthyridines, and imidazopyridines) with an oxime substituent at the 1-position, pharmaceutical compositions containing the compounds, intermediates, and methods of use of these compounds as immunomodulators, for inducing cytokine biosynthesis in animals and in the treatment of diseases including viral and neoplastic diseases are disclosed.