Synlett 2008(3): 381-385  
DOI: 10.1055/s-2008-1032051
LETTER
© Georg Thieme Verlag Stuttgart · New York

From Solution-Phase to ‘On-Column’ N-Dearylation of β-Lactams by Silica-Supported Ceric Ammonium Nitrate (CAN-SiO2)

Aliasghar Jarrahpour*, Maaroof Zarei
Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran
Fax: +98(711)2280926; e-Mail: jarrah@chem.susc.ac.ir; e-Mail: aliasghar6683@yahoo.com;
Further Information

Publication History

Received 31 October 2007
Publication Date:
16 January 2008 (online)

Abstract

It has been shown that N-(4-methoxy or 4-ethoxyphenyl) groups can be oxidatively removed by silica gel supported ceric ammonium nitrate (CAN-SiO2) under mild conditions in solution and on column. The yields in these two methods were good to excellent and purification of products is simpler than the general method by CAN. Especially the ‘on-column’ reaction is mild, easy, efficient, and cheap. The lower mobility of CAN-SiO2 makes it safer to handle.