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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 33, 2003 - Issue 3
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Original Articles

Rapid Removal of Benzyloxycarbonyl Groups from 1,4,7,10-Tetraazacyclododecane Derivatives by Catalytic Transfer Hydrogenation

, , &
Pages 457-461 | Received 22 Feb 2002, Published online: 17 Aug 2006
 

Abstract

We report that N-benzyloxycarbonyl groups can be conveniently removed from 1,4,7,10-tetraazacyclododecanes by catalytic transfer hydrogenation with cyclohexene and 5% palladium–carbon catalyst. The process is rapid, selective, inexpensive, and is high yielding.

Acknowledgments

The financial support of the Whitaker foundation and the Dow Chemical Company are acknowledged. Contributions from John Griffin are gratefully acknowledged.

Notes

aAll compounds were characterized by 1H NMR, 13C NMR, 31P NMR, and CHN analysis.

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