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Synthesis 2007(9): 1392-1402
DOI: 10.1055/s-2007-966016
DOI: 10.1055/s-2007-966016
PAPER
© Georg Thieme Verlag Stuttgart · New York
A Facile Synthesis of Aryl Spirodioxines Based on a 3H,3′H-2,2′-Spirobi(benzo[b][1,4]dioxine) Skeleton
Further Information
Publication History
Received
1 February 2007
Publication Date:
18 April 2007 (online)


Abstract
The synthesis of a series of 6,6-bisbenzannulated spiroketals containing a 3H,3′Η-2,2′-spirobi(benzo[b][1,4]dioxine) ring system is reported. The key step involves addition of a monobenzyl-protected catechol to the epoxide unit of a glycidol bearing a benzyl-protected catechol. The resultant alcohol adduct is oxidized to a ketone that then undergoes hydrogenation and acid-catalyzed cyclization to produce the desired spirodioxines.
Key words
bisbenzannulated spiroketals - benzyl ether - catechol - epoxide - spirodioxines