Synthesis 2014; 46(23): 3249-3255
DOI: 10.1055/s-0034-1378585
paper
© Georg Thieme Verlag Stuttgart · New York

Novel and Efficient Debenzylation of N-Benzyltetrazole Derivatives with the Rosenmund Catalyst

Masahiko Seki*
Process R&D Department, Healthcare Business Division II, API Corporation, 2-3-4, Nihonbashi, Chuo-ku, Tokyo 103-0027, Japan   Fax: +81(3)52050642   eMail: seki.masahiko@mm.api-corp.co.jp
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Publikationsverlauf

Received: 18. Juni 2014

Accepted after revision: 15. Juli 2014

Publikationsdatum:
21. August 2014 (online)


Abstract

The Rosenmund catalyst (Pd/BaSO4) was found to efficiently catalyze debenzylation of N-benzyltetrazole derivatives with ammonium formate by catalytic transfer hydrogenation under mild conditions. The protocol has been applied to functionalized substrates to provide various angiotensin II receptor blockers in excellent yields.

Supporting Information

 
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