Synthesis 2002(3): 0361-0364
DOI: 10.1055/s-2002-20035
PAPER
© Georg Thieme Verlag Stuttgart · New York

A Novel Synthesis of a Key Intermediate for (+)-Biotin from l-Aspartic Acid

Masahiko Seki*, Toshiaki Shimizu, Koichi Inubushi
Product & Technology Development Laboratory, Tanabe Seiyaku Co., Ltd., 3-16-89, Kashima, Yodogawa-ku, Osaka 532-8505, Japan
Fax: +81(6)63002816; e-Mail: m-seki@tanabe.co.jp;
Further Information

Publication History

Received 30 October 2001
Publication Date:
28 July 2004 (online)

Abstract

The aldol reaction of an N-Cbz-3-amino-4-butanolide 4, derived from l-aspartic acid, with formaldehyde gave the trans-disubstituted 3-amino-4-butanolide 5 stereoselectively. Following protection of the hydroxyl group of 5, amidation and oxidation provided the β-substituted l-asparagine derivative 6. The Hofmann rearrangement of 6 with sodium hypochlorite in the presence of sodium hydroxide and subsequent hydrogenation gave the bicyclic lactone 11, which upon dibenzylation and thionation, gave the thiolactone 2, a key intermediate for the synthesis of (+)-biotin (1).

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X-ray data for the compound 11 have been deposited at the Cambridge Crystallographic Data Centre.

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The optical purity of the product 2 was determined to be >99% ee by HPLC.