with benzenedicarboxylic acid, constitute selective catalysts for the reduction of carbon-carbon multiplebonds in alkenes, alkynes and α,β-unsaturated esters with hydrazine hydrate in acetonitrile under mild conditions. The present protocol enjoys advantages such as convenient reaction conditions and benign, reusable and cost effective catalyst.
METHOD FOR MANUFACTURING RUTHENIUM CARBENE COMPLEXES
申请人:Kadyrov Renat
公开号:US20110040099A1
公开(公告)日:2011-02-17
A method of manufacturing ruthenium carbene complexes and novel aryl alkylidene ruthenium complexes based on the method, the complexes able to used as catalysts in metathesis reactions.
An efficient Cu-catalyzed cascade reaction involving N–O bond cleavage and C–C/C–N/N–N bond formations is developed to afford various 1,3- and 1,3,4-substituted pyrazoles.
Utility of Ketonic Mannich Bases in Synthesis of Some New Functionalized 2-Pyrazolines
作者:Elsayed M. Afsah、Eman M. Keshk、Abdel-Rahman H. Abdel-Rahman、Najla F. Jomah
DOI:10.1002/jhet.3055
日期:2018.1
piperazine to give 13. N‐Nitrosation of the sec‐Mannichbases 15a–d followed by reductive cyclization affords 2‐pyrazolines 17a–d. The keto base 14b has been used for the synthesis of 2‐pyrazolines having a phenolic Mannich base at C‐3 and its reaction with 3,5‐dimethyl‐1H‐pyrazole affords 23. The alkylation of 3‐methyl‐1‐phenyl‐2‐pyrazolin‐5‐one with the bis(Mannich base) 25 was investigated.