Cyclizations of α-Diketones to α-Hydroxycyclopentenones on Silica Gel in the Absence of Solvent
作者:Marcus Tius、Elizabeth Uhrich、William Batson
DOI:10.1055/s-2006-942420
日期:2006.7
Stirring α,β-unsaturated α-diketones in the presence of activated silica gel results in cyclization to α-hydroxycyclopentenones in good yield. The reaction is sensitive to the mode of stirring and proceeds more rapidly in the presence of triethylamine. This is consistent with a Nazarov reaction proceeding through the enol tautomer of the α-diketone.
在活性硅胶存在下搅拌β,β-不饱和β-二酮,可使其环化为β-羟基环戊烯酮,收率较高。该反应对搅拌方式敏感,在存在三乙胺的情况下反应速度更快。这与通过β-二酮的烯醇互变异构体进行的纳扎罗夫反应一致。