- Pentaalkylmethylguanidinium methylcarbonates - Versatile precursors for the preparation of halide-free and metal-free guanidinium-based ILs
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Pentaalkylmethylguanidinium methylcarbonates 6 can easily be prepared from pentaalkylguanidines 5 and dimethyl carbonate (DMC) in a sustainable solvent-free synthesis. Most of the title compounds are room temperature ionic liquids (RTILs) which provide convenient access to halide-free guanidinium-based ILs (GILs) 7via acid-base reactions and subsequent decarboxylation, similar to industrially important imidazolium methylcarbonates 1. The Royal Society of Chemistry.
- Oelkers, Benjamin,Sundermeyer, Joerg
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experimental part
p. 608 - 618
(2011/05/11)
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- Orthoamides, lxix [1]. Contributions to the synthesis of N,N,N′,N′,N″-peralkylated guanidines and N,N,N′, N′,N″,N″-persubstituted guanidinium salts
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N,N,N′,N′-Tetraalkyl-chloroformamidinium chlorides 6 are prepared from N,N,N′,N′-tetraalkylureas 5 and phosgene in acetonitrile. The iminium salts 6 react with primary and secondary amines in the presence of triethylamine to give N,N,N′,N′,N″- pentasubsti
- Kantlehner, Willi,Jochenmezger,Kre?, Ralf,Hartmann, Horst,Moschny, Thorsten,Tiritiris, Ioannis,Iliev, Boyan,Scherr, Oliver,Ziegler, Georg,Souley, Bahari,Frey, Wolfgang,Ivanov, Ivo C.,Bogdanov, Milen G.,J?ger, Ulrich,Dospil, Günther,Viefhaus, Tillmann
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experimental part
p. 873 - 906
(2011/01/08)
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- Pentaalkylguanidines as etherification and esterification catalysts
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Several pentaalkylguanidines have been prepared and found to be superior catalysts for the preparation of aryl and aralkyl ethers from carbonates and for the methylation of phenols with dimethylcarbonate.They also act as effective catalysts for esterification of acids with alkyl chloroformates but not for the acetylation of tertiary alcohols with acetic anhydride.
- Barcelo, Gerard,Grenouillat, Denis,Senet, Jean-Pierre,Sennyey, Gerard
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p. 1839 - 1848
(2007/10/02)
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