20653-49-0Relevant articles and documents
Asymmetric synthesis of the four stereoisomers of 5-deoxystrigol
Lachia, Mathilde,Dakas, Pierre-Yves,De Mesmaeker, Alain
, p. 6577 - 6581 (2014)
Two approaches to the strigolactone tricyclic lactone skeleton 2 were investigated using ketene/ketene-iminium cycloaddition to olefins. Finally, the first enantioselective access to the four stereoisomers of 5-deoxystrigol 1 is reported using an intramolecular [2+2] cycloaddition of homochiral ketene-iminium salts 5. Very high asymmetric control was achieved with C-2 symmetric pyrrolidines as chiral auxiliary.
Synthesis of Some Substituted Benzofuranones
Sharma, Sitaram,Ray, J. K.,Chatterjee, Basanta G.
, p. 829 - 830 (2007/10/02)
A suitably placed carbalkoxy group in Hagemann's ester (I) helps in enolisation of the keto ester with subsequent formation of γ-lactone (V).This is followed by aromatization of the product to give a substituted benzofuranone (III) in very good yield.
