Silver-Catalyzed Enantioselective Desymmetrization: Facile Access to Spirolactone-Pyrrolidines Containing a Spiro Quaternary Stereogenic Center
作者:Kang Liu、Huai-Long Teng、Lu Yao、Hai-Yan Tao、Chun-Jiang Wang
DOI:10.1021/ol400821q
日期:2013.5.3
An unprecedented Ag(I)-catalyzed asymmetric desymmetrization of Spiro cyclohexadienone lactones has been developed successfully, which performs well over a broad scope of substrates and provides a facile access to optically active spirolactone-pyrrolidines in high yields with excellent levels of diastereo-/enantioselectivities.
Organic synthesis using a hypervalent iodine reagent: unexpected and novel domino reaction leading to spiro cyclohexadienone lactones
作者:Hiromichi Fujioka、Hideyuki Komatsu、Taeko Nakamura、Akihito Miyoshi、Kayoko Hata、Jnashuara Ganesh、Kenichi Murai、Yasuyuki Kita
DOI:10.1039/b925687c
日期:——
The reaction of 1-(p-hydroxyaryl)cyclobutanols and phenyl iodide(III) diacetate in hexafluoroisopropanol and water produced spiro cyclohexadienone lactones via a domino reaction.
In this study, the rapid transformation of inexpensive phenols into polyfunctionalized cyclohexenones containing a phosphonate in one pot is described. Such systems readily obtained from simple aromatic compounds could open up a multitude of synthetic possibilities. For example, this scaffold was easily and stereoselectively transformed into the corresponding enol functionality in the same pot by the