TY - JOUR
T1 - Ionic liquid catalysed synthesis of β-hydroxy ketones
AU - Karmee, Sanjib Kumar
AU - Hanefeld, Ulf
PY - 2011
Y1 - 2011
N2 - Different acidic ionic liquids (ILs; namely, 1-methylimidazolium tetrafluoroborate, 1-methylimidazolium trifluoroacetate, N-methyl-2-pyrrolidone hydrogen sulfate, N,N,N-trioctyl-n-butanesulfonic acid ammonium hydrogen sulfate, 1-methyl-3-(3-sulfobutyl)imidazolium hydrogen sulfate) and basic ILs (namely, 1,1,3,3-tetramethylguanidinium lactate and choline hydroxide) were tested as catalysts for the aldol reaction. The choline hydroxide catalysed reaction gave high yield (94.3%) and selectivity of the 4-hydroxy-4-phenylbutan- 2-one after a short reaction time (15min) at 0°C. This article demonstrates the potential of choline hydroxide, which is a derivative of choline and a naturally occurring water-soluble essential nutrient, as a highly active and selective green catalyst.
AB - Different acidic ionic liquids (ILs; namely, 1-methylimidazolium tetrafluoroborate, 1-methylimidazolium trifluoroacetate, N-methyl-2-pyrrolidone hydrogen sulfate, N,N,N-trioctyl-n-butanesulfonic acid ammonium hydrogen sulfate, 1-methyl-3-(3-sulfobutyl)imidazolium hydrogen sulfate) and basic ILs (namely, 1,1,3,3-tetramethylguanidinium lactate and choline hydroxide) were tested as catalysts for the aldol reaction. The choline hydroxide catalysed reaction gave high yield (94.3%) and selectivity of the 4-hydroxy-4-phenylbutan- 2-one after a short reaction time (15min) at 0°C. This article demonstrates the potential of choline hydroxide, which is a derivative of choline and a naturally occurring water-soluble essential nutrient, as a highly active and selective green catalyst.
KW - aldol reaction
KW - ionic liquids
KW - organocatalysis
KW - sustainable chemistry
UR - http://www.scopus.com/inward/record.url?scp=80051991299&partnerID=8YFLogxK
U2 - 10.1002/cssc.201100083
DO - 10.1002/cssc.201100083
M3 - Article
C2 - 21717582
SN - 1864-5631
VL - 4
SP - 1118
EP - 1123
JO - ChemSusChem (Print): chemistry & sustainability, energy & materials
JF - ChemSusChem (Print): chemistry & sustainability, energy & materials
IS - 8
ER -