Synthesis of derivatives of prenylacetic acids by reactions of alkyl malonate, cyanoacetate, and acetoacetate with alkylating reagents in ionic liquids
作者:G. V. Kryshtal、G. M. Zhdankina、S. G. Zlotin
DOI:10.1023/b:rucb.0000035652.61455.b9
日期:2004.3
A method for the synthesis of carboxylic acid derivatives containingone or two —CH2CHn(Me)CHn+1CH2— fragments (n = 0, 1) was developed. The method is based on the alkylation of (di)alkyl malonates, cyanoacetates, and acetoacetates with acyclic prenyl halides in ionic liquids, 1-butyl-3-methylimidazolium hexafluorophosphate and tetrafluoroborate. For the ambident ethyl acetoacetate anion, the reactions
Towards organo-click reactions: development of pharmaceutical ingredients by using direct organocatalytic bio-mimetic reductions
作者:Dhevalapally B. Ramachary、G. Babul Reddy
DOI:10.1039/b612611a
日期:——
Economic and environmentally friendly bio-mimetic one-pot three and four-component Knoevenagel–hydrogenation (K–H), five-component Knoevenagel–hydrogenation–alkylation (K–H–A) and six-component Knoevenagel–hydrogenation–alkylation–Huisgen cycloaddition (K–H–A–HC) reactions of aldehydes, CH-acids, o-phenylenediamine, alkyl halides and azides using proline, proline–metal carbonate and proline–metal carbonate–CuI-catalysis, respectively have been developed. Many of K–H and K–H–A compounds have direct application in pharmaceutical chemistry.