Published TCIMAIL newest issue No.199
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Polymer-Supported Dehydrating Agent
No.123(July 2005)
- M1452
- 3-Methyl-2-oxoimidazolidin-1-ylmethyl Polystyrene Resin, cross-linked with 1% DVB (1) (*This product is discontinued.)
Polymer-supported 1,3-dimethyl-2-imidazolidinone (1), is converted to the dehydrating agent 2 upon chlorination with oxalyl chloride. The chloro compound 2 is a very active esterification agent, and hindered compounds such as pivalic acid or tert-butyl alcohol are converted to esters in good yield. After the reaction, 1 is easily recovered through filtration and reused repeatedly. This method, developed by Ishikawa and co-worker, is expected to be an environmentally friendly dehydration condensation method.
References
- Polymer-supported DMI as a potential heterogeneous dehydrating agent
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