Exploration of the Role of Double Schiff Bases as Catalytic Intermediates in the Knoevenagel Reaction of Furanic Aldehydes: Mechanistic Considerations
作者:Jack van Schijndel、Luiz Canalle、Dennis Molendijk、Jan Meuldijk
DOI:10.1055/s-0037-1610235
日期:2018.9
considerations on an efficient, green, and solvent-freeKnoevenagelprocedure for the chemical transformation of furanic aldehydes into their corresponding α,β-unsaturated compounds. In the proposed mechanism furanic aldehydes react with ammonia, released from ammonium salts, to form a catalytically active double Schiff base. The catalytic intermediates involved in the condensation step are characterized
Molecular mass enhancement of biological feedstocks
申请人:Georgia Tech Research Corporation
公开号:US08236972B2
公开(公告)日:2012-08-07
The instant invention involves a process for enhancing molecular mass of biomass reactants. The process comprises first forming a substituted or unsubstituted furfural from a biomass. The substituted or unsubstituted furfural is then reacted with an activated methylene compound in the presence of a catalyst and, if desired, a solvent to form a Knoevenagel product. The product may then be hydrogenated to products containing an alcohol, ether, aldehyde, or ketone functional groups or to an olefinic or aliphatic species wherein as much as all of the oxygen and/or nitrogen has been removed.
Middendorp, Recueil des Travaux Chimiques des Pays-Bas, 1919, vol. 38, p. 42
作者:Middendorp
DOI:——
日期:——
MNDZHOYAN O. L.; AVETISYAN S. A.; AZARYAN L. V.; NESUNTS N. S., SINTEZY GETEROTSIKL. SOEDIN. (EREVAN), 1981, HO 12, 47-49
作者:MNDZHOYAN O. L.、 AVETISYAN S. A.、 AZARYAN L. V.、 NESUNTS N. S.
DOI:——
日期:——
MOLECULAR MASS ENHANCEMENT OF BIOLOGICAL FEEDSTOCKS
申请人:Hoskins Travis J. C.
公开号:US20100029926A1
公开(公告)日:2010-02-04
The instant invention involves a process for enhancing molecular mass of biomass reactants. The process comprises first forming a substituted or unsubstituted furfural from a biomass. The substituted or unsubstituted furfural is then reacted with an activated methylene compound in the presence of a catalyst and, if desired, a solvent to form a Knoevenagel product. The product may then be hydrogenated to products containing an alcohol, ether, aldehyde, or ketone functional groups or to an olefinic or aliphatic species wherein as much as all of the oxygen and/or nitrogen has been removed.