Author/Authors :
Satoh، نويسنده , , Tsuyoshi and Nagamoto، نويسنده , , Shinobu and Yajima، نويسنده , , Masanobu and Yamada، نويسنده , , Yukie and Ohata، نويسنده , , Yuki and Tadokoro، نويسنده , , Makoto، نويسنده ,
Abstract :
The sulfoxide–magnesium exchange reaction of aryl 1-chlorocyclopropyl sulfoxides with i-PrMgCl in THF at low temperature gave magnesium cyclopropylidenes. Treatment of the magnesium cyclopropylidenes with lithium naphtholates or phenolates resulted in the formation of spiro[2.6]nonadienones in up to 82% yield. The structure of the spiro[2.6]nonadienones was found to be dependent on the structure of the naphtholates and phenolates.
Keywords :
Cyclopropylation , ring-expansion , Magnesium carbenoid , Magnesium cyclopropylidene
