Synthesis 2014; 46(11): 1481-1486
DOI: 10.1055/s-0033-1341068
paper
© Georg Thieme Verlag Stuttgart · New York

DEPBT as Coupling Reagent To Avoid Racemization in a Solution-Phase Synthesis of a Kyotorphin Derivative

Vasanthakumar G. Ramu
Innovation Laboratory in Organic Chemistry Processes and Products (LIPPSO), Department of Chemistry, University of Girona, Campus Montilivi, 17071 Girona, Spain   Fax: +34(972)418150   Email: montserrat.heras@udg.edu
,
Eduard Bardaji
Innovation Laboratory in Organic Chemistry Processes and Products (LIPPSO), Department of Chemistry, University of Girona, Campus Montilivi, 17071 Girona, Spain   Fax: +34(972)418150   Email: montserrat.heras@udg.edu
,
Montserrat Heras*
Innovation Laboratory in Organic Chemistry Processes and Products (LIPPSO), Department of Chemistry, University of Girona, Campus Montilivi, 17071 Girona, Spain   Fax: +34(972)418150   Email: montserrat.heras@udg.edu
› Author Affiliations
Further Information

Publication History

Received: 14 February 2014

Accepted after revision: 06 March 2014

Publication Date:
02 April 2014 (online)


Abstract

The synthesis of IbKTP-NH2 with reduction of racemization up to no detectable level has been achieved using 3-(diethoxyphosphoryloxy)-1,2,3-benzotriazin-4(3H)-one (DEPBT). Among all coupling systems tested, only DEPBT-mediated amide bond formation between Nα-acylated tyrosine and arginine without loss of optical purity.

Supporting Information

 
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