Synlett 2012; 23(9): 1402-1406
DOI: 10.1055/s-0031-1290963
letter
© Georg Thieme Verlag Stuttgart · New York

Continuous-Flow Processing of Gaseous Ammonia Using a Teflon AF-2400 Tube-in-Tube Reactor: Synthesis of Thioureas and In-Line Titrations

Duncan L. Browne
Whiffen Laboratory, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK, Fax: +44(1223)336442   Email: [email protected]
,
Matthew O’Brien
Whiffen Laboratory, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK, Fax: +44(1223)336442   Email: [email protected]
,
Peter Koos
Whiffen Laboratory, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK, Fax: +44(1223)336442   Email: [email protected]
,
Philippa B. Cranwell
Whiffen Laboratory, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK, Fax: +44(1223)336442   Email: [email protected]
,
Anastasios Polyzos
Whiffen Laboratory, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK, Fax: +44(1223)336442   Email: [email protected]
,
Steven V. Ley*
Whiffen Laboratory, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK, Fax: +44(1223)336442   Email: [email protected]
› Author Affiliations
Further Information

Publication History

Received: 24 February 2012

Accepted after revision: 23 March 2012

Publication Date:
08 May 2012 (online)


Abstract

A simple tube-in-tube reactor based on the gas-permeable membrane Teflon AF-2400 was used in the continuous flow reaction of gaseous ammonia with isothiocyanates and one isocyanate. A colourimetric in-line titration technique is also reported as a simple method to quantify the amount of ammonia taken up by the solvent in the system.

 
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