203317-83-3Relevant academic research and scientific papers
Enantiospecific syntheses of (+)-crotepoxide, (+)-boesenoxide, (+)-β- senepoxide, (+)-pipoxide acetate, (-)-iso-crotepoxide, (-)-senepoxide, and (- )-tingtanoxide from (-)-quinic acid
Shing,Tam
, p. 1547 - 1554 (2007/10/03)
A convenient strategy that is ideally suited for the Construction of all the naturally occurring cyclohexane diepoxides and cyclohexene epoxides is described. The key intermediate 12, a 1,3-cyclohexadiene, has been prepared from (-)-quinic acid in 11 steps with 18% overall yield: Singlet oxygen photooxygenation of the 1,3-cyclohexadiene followed by rearrangement of the resultant endoperoxides with either cobalt-meso-tetraphenylporphyrin or trimethyl phosphite afforded enantiopure (+)-crotepoxide, (+)-boesenoxide, and (-)-iso-crotepoxide or (-)-senepoxide, (+)-β-senepoxide, (+)-pipoxide acetate, and (-)-tingtanoxide, respectively.
First enantiospecific syntheses of crotepoxide and iso-crotepoxide from (-)-quinic acid
Shing, Tony K. M.,Tam, Eric K. W.
, p. 353 - 356 (2007/10/03)
The optically active crotepoxide 1 and iso-crotepoxide 2 have been constructed from quinic acid involving a singlet oxygen photooxygenation as the key step.
