NDLI: Driving an equilibrium acetalization to completion in the presence of water

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Driving an equilibrium acetalization to completion in the presence of water

Content Provider	Semantic Scholar
Author	Minakawa, Maki Yamada, Yoichi Uozumi, Yasuhiro
Copyright Year	2014
Abstract	Formation of an acetal from a carbonyl substrate by condensation with an alcohol is a classical reversible equilibrium reaction in which the water formed must be removed to drive the reaction to completion. A new method has been developed for acetalization of carbonyl substrates by diols in the presence of water. Complexation of poly(4-styrenesulfonic acid) with poly(4-vinylpyridine) generates a catalytic membrane of polymeric acid at the interface between two parallel laminar flows in a microchannel of a microflow reactor. The catalytic membrane provides a permeable barrier between the organic layer and water-containing layer in the reaction, and permits discharge of water to the outlet of the microreactor to complete the acetalization. Condensation of a variety of carbonyl substrates with diols proceeded in the presence of water in the microflow device to give the corresponding acetals in yields of up to 97% for residence times of 19 to 38 s.
Starting Page	36864
Ending Page	36867
Page Count	4
File Format	PDF HTM / HTML
DOI	10.1039/C4RA07116F
Alternate Webpage(s)	https://pubs.rsc.org/en/content/getauthorversionpdf/C4RA07116F
Alternate Webpage(s)	http://www.rsc.org/suppdata/ra/c4/c4ra07116f/c4ra07116f1.pdf
Alternate Webpage(s)	https://doi.org/10.1039/C4RA07116F
Volume Number	4
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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