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Synthesis 2007(5): 754-760
DOI: 10.1055/s-2007-965911
DOI: 10.1055/s-2007-965911
PAPER
© Georg Thieme Verlag Stuttgart · New York
A Facile Synthesis of 1,1′-Spirobi(3H,3′H)isobenzofurans
Weitere Informationen
Publikationsverlauf
Received
7 November 2006
Publikationsdatum:
25. Januar 2007 (online)


Abstract
The synthesis of a series of aryl 5,5-spiroketals containing a 1,1′-spirobi(3H,3′H)isobenzofuran ring system is reported. The key step involves addition of an aryllithium derived from a protected bromobenzyl alcohol to a phthalide; this is followed by deprotection of the benzyl alcohol and acid-catalysed cyclisation.
Key words
spiro compounds - ketals - phthalides - lithium compounds - heterocycles