Synlett 2008(4): 513-516  
DOI: 10.1055/s-2008-1042756
LETTER
© Georg Thieme Verlag Stuttgart · New York

Chemoenzymatic and Chemical Routes to the Nonproteinaceous Amino Acid Albizziine and Its Amide Derivative

Nina A. Dobrovinskayaa, I. Archerb, Alison N. Hulme*a
a School of Chemistry, The University of Edinburgh, Kings Buildings, West Mains Road, Edinburgh, EH9 3JJ, UK
Fax: +44(131)6504743; e-Mail: Alison.Hulme@ed.ac.uk;
b Ingenza Ltd., Wallace Building, Roslin BioCentre, Midlothian, EH25 9PP, UK
Further Information

Publication History

Received 14 November 2007
Publication Date:
12 February 2008 (online)

Abstract

A two-step route for the synthesis of albizziine from -Boc-asparagine which proceeds in 65% overall yield is disclosed. A high-yielding, six-step route for the synthesis of its protected amido derivative gives rapid access to a key component of the complex aminopolyol natural product, zwittermicin A.

28

Boc deprotection using TFA, TFA-CH2Cl2, or HCl-dioxane, was found to be unsuccessful in this instance.