Supported and liquid phase task specific ionic liquids for base catalysed Knoevenagel reactions

Cristina Paun; J. Barklie; Peter Goodrich; Nimal Gunaratne; A. McKeown; V.I. Parvulescu; Christopher Hardacre

doi:10.1016/j.molcata.2007.01.002

Supported and liquid phase task specific ionic liquids for base catalysed Knoevenagel reactions

Cristina Paun, J. Barklie, Peter Goodrich, Nimal Gunaratne, A. McKeown, V.I. Parvulescu, Christopher Hardacre

School of Chemistry and Chemical Engineering

Research output: Contribution to journal › Article › peer-review

75 Citations (Scopus)

Abstract

A series of Hunig's base tethered ammonium ionic liquids have been used to catalyse the Knoevenagel condensation of aldehydes/ketones with malononitrile and ethyl cyanoacetate. The reactions were performed under homogeneous and under biphasic, liquid-liquid and liquid-silica supported ionic liquid, conditions with the biphasic systems employing cyclohexene as the second phase. By increasing the distance between the ammonium head group and Hunig's base the activity of the catalyst was found to increase. Higher activity, in general, was found under homogeneous reaction conditions; however, the recyclability of the catalyst was improved by supporting the BIL under biphasic conditions. (c) 2007 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	64-71
Number of pages	8
Journal	JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
Volume	269 (1-2)
Issue number	1-2
DOIs	https://doi.org/10.1016/j.molcata.2007.01.002
Publication status	Published - 18 May 2007

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology
Materials Science (miscellaneous)

Access to Document

10.1016/j.molcata.2007.01.002

Cite this

@article{8d138a2991d44bddbe2a6749d8d56467,

title = "Supported and liquid phase task specific ionic liquids for base catalysed Knoevenagel reactions",

abstract = "A series of Hunig's base tethered ammonium ionic liquids have been used to catalyse the Knoevenagel condensation of aldehydes/ketones with malononitrile and ethyl cyanoacetate. The reactions were performed under homogeneous and under biphasic, liquid-liquid and liquid-silica supported ionic liquid, conditions with the biphasic systems employing cyclohexene as the second phase. By increasing the distance between the ammonium head group and Hunig's base the activity of the catalyst was found to increase. Higher activity, in general, was found under homogeneous reaction conditions; however, the recyclability of the catalyst was improved by supporting the BIL under biphasic conditions. (c) 2007 Elsevier B.V. All rights reserved.",

author = "Cristina Paun and J. Barklie and Peter Goodrich and Nimal Gunaratne and A. McKeown and V.I. Parvulescu and Christopher Hardacre",

year = "2007",

month = may,

day = "18",

doi = "10.1016/j.molcata.2007.01.002",

language = "English",

volume = "269 (1-2)",

pages = "64--71",

journal = "JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL",

publisher = "Elsevier B.V.",

number = "1-2",

}

TY - JOUR

T1 - Supported and liquid phase task specific ionic liquids for base catalysed Knoevenagel reactions

AU - Paun, Cristina

AU - Barklie, J.

AU - Goodrich, Peter

AU - Gunaratne, Nimal

AU - McKeown, A.

AU - Parvulescu, V.I.

AU - Hardacre, Christopher

PY - 2007/5/18

Y1 - 2007/5/18

N2 - A series of Hunig's base tethered ammonium ionic liquids have been used to catalyse the Knoevenagel condensation of aldehydes/ketones with malononitrile and ethyl cyanoacetate. The reactions were performed under homogeneous and under biphasic, liquid-liquid and liquid-silica supported ionic liquid, conditions with the biphasic systems employing cyclohexene as the second phase. By increasing the distance between the ammonium head group and Hunig's base the activity of the catalyst was found to increase. Higher activity, in general, was found under homogeneous reaction conditions; however, the recyclability of the catalyst was improved by supporting the BIL under biphasic conditions. (c) 2007 Elsevier B.V. All rights reserved.

AB - A series of Hunig's base tethered ammonium ionic liquids have been used to catalyse the Knoevenagel condensation of aldehydes/ketones with malononitrile and ethyl cyanoacetate. The reactions were performed under homogeneous and under biphasic, liquid-liquid and liquid-silica supported ionic liquid, conditions with the biphasic systems employing cyclohexene as the second phase. By increasing the distance between the ammonium head group and Hunig's base the activity of the catalyst was found to increase. Higher activity, in general, was found under homogeneous reaction conditions; however, the recyclability of the catalyst was improved by supporting the BIL under biphasic conditions. (c) 2007 Elsevier B.V. All rights reserved.

UR - http://www.scopus.com/inward/record.url?scp=33947721272&partnerID=8YFLogxK

U2 - 10.1016/j.molcata.2007.01.002

DO - 10.1016/j.molcata.2007.01.002

M3 - Article

VL - 269 (1-2)

SP - 64

EP - 71

JO - JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL

JF - JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL

IS - 1-2

ER -

Supported and liquid phase task specific ionic liquids for base catalysed Knoevenagel reactions

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this