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.
作者:William A. Batson、Divakaramenon Sethumadhavan、Marcus A. Tius
DOI:10.1021/ol050970x
日期:2005.6.1
[reaction: see text] Metalloenolates derived from alpha,beta-unsaturated alpha-diketones undergo cyclization to alpha-hydroxy cyclopentenones. This is apparently the first reported Nazarov reaction that takes place in the presence of base.