<i>N</i>-Iodosuccinimide-Initiated Spirocyclopropanation of Styrenes with 1,3-Dicarbonyl Compound for the Synthesis of Spirocyclopropanes
作者:Ping Qian、Bingnan Du、Ruichun Song、Xiaodong Wu、Haibo Mei、Jianlin Han、Yi Pan
DOI:10.1021/acs.joc.6b01163
日期:2016.8.5
Herein is reported an N-iodosuccinimide-initiated spirocyclopropanation reaction of styrenes with 1,3-dicarbonylcompounds in the presence of white LED light. The reaction proceeds via two C–H and two C–I bond cleavage event, along with two C–C bond formation event, and formation of quaternary centers. These reactions could be carried out at room temperature and tolerated a wide range of substrates
Metal-free intermolecular cyclopropanation between alkenes and iodonium ylides mediated by PhI(OAc)<sub>2</sub>·Bu<sub>4</sub>NI
作者:Jason Tao、Carl D. Estrada、Graham K. Murphy
DOI:10.1039/c7cc04859a
日期:——
A rapid, mild and metal-freeintermolecular cyclopropanation between iodonium ylides and alkene-containing substrates mediated by PhI(OAc)2·Bu4NI is reported. Iodonium ylides of cyclic and acyclic 1,3-dicarbonyls were reacted with a variety of mono-, di-, tri- and tetra-substituted alkenes of various structural types to give 29 cyclopropanes in up to 97% yield.
Efficient Synthesis of Spirobarbiturates and Spirothiobarbiturates Bearing Cyclopropane Rings by Rhodium(II)-Catalyzed Reactions of Cyclic Diazo Compounds
作者:Xue Wang、Yong Rok Lee
DOI:10.5012/bkcs.2013.34.6.1735
日期:2013.6.20
Accepted March 16, 2013Rhodium(II)-catalyzed reactions of cyclic diazo compounds derived from barbituric acid and thiobarbituricacid with a variety of styrene moieties were examined. These reactions provide rapid synthetic routes to thepreparations of spirobarbiturates and spirothiobarbiturates bearing cyclopropanerings. Key Words : Rhodium(II)-catalyzed reactions, Spirobarbiturates, Spirothiobarbiturates