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Molecules 2012, 17(4), 4533-4544; doi:10.3390/molecules17044533
Article

Large-Scale Solvent-Free Chlorination of Hydroxy-Pyrimidines, -Pyridines, -Pyrazines and -Amides Using Equimolar POCl3

1,2, 2, 2, 2, 2, 1,*  and 2,*
Received: 7 March 2012; in revised form: 31 March 2012 / Accepted: 6 April 2012 / Published: 16 April 2012
(This article belongs to the Special Issue Solvent-Free Synthesis)
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Abstract: Chlorination with equimolar POCl3 can be efficiently achieved not only for hydroxypyrimidines, but also for many other substrates such as 2-hydroxy-pyridines, -quinoxalines, or even -amides. The procedure is solvent-free and involves heating in a sealed reactor at high temperatures using one equivalent of pyridine as base. It is suitable for large scale (multigram) batch preparations.
Keywords: solvent-free; chlorination; phosphorous oxychloride (POCl3) solvent-free; chlorination; phosphorous oxychloride (POCl3)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Wang, H.; Wen, K.; Wang, L.; Xiang, Y.; Xu, X.; Shen, Y.; Sun, Z. Large-Scale Solvent-Free Chlorination of Hydroxy-Pyrimidines, -Pyridines, -Pyrazines and -Amides Using Equimolar POCl3. Molecules 2012, 17, 4533-4544.

AMA Style

Wang H, Wen K, Wang L, Xiang Y, Xu X, Shen Y, Sun Z. Large-Scale Solvent-Free Chlorination of Hydroxy-Pyrimidines, -Pyridines, -Pyrazines and -Amides Using Equimolar POCl3. Molecules. 2012; 17(4):4533-4544.

Chicago/Turabian Style

Wang, Han; Wen, Kun; Wang, Le; Xiang, Ye; Xu, Xiaocheng; Shen, Yongjia; Sun, Zhihua. 2012. "Large-Scale Solvent-Free Chlorination of Hydroxy-Pyrimidines, -Pyridines, -Pyrazines and -Amides Using Equimolar POCl3." Molecules 17, no. 4: 4533-4544.



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