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Synthesis 2001(6): 0855-0862
DOI: 10.1055/s-2001-13404
DOI: 10.1055/s-2001-13404
PAPER
© Georg Thieme Verlag Stuttgart · New York
Synthesis of Arylspiroketals Related to the Papulacandins via Generation of Phthalide Oxycarbenium Ions
Weitere Informationen
Received
20 November 2000
Publikationsdatum:
24. September 2004 (online)
Publikationsverlauf
Publikationsdatum:
24. September 2004 (online)
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Abstract
The nucleophilic addition of allylstannanes to oxycarbenium ions generated from phthalide acetate has been studied. The optimum conditions involve the use of trimethylsilyl trifluoromethanesulfonate in dichloromethane at -78 °C. Hydroboration of the allylated products followed by oxidative cyclization provides an efficient synthesis of arylspiroketals which are closely related to the papulacandins.
Key words
phthalides - oxycarbenium ions - papulacandins - spiroketals - allylstannanes
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