A Stereoselective and Regioselective
Synthesis of <i>trans</i>,<i>trans</i>-Configured 1,2,3-Trisubstituted
Indanes: Cycloaddition of Alkenes with Iodonium Ylides of β-Disulfones<b />
l) methylides α-γ with alkenes 1 affords the multiply trisubstituted indanes 2 in moderate to good yields, through an unusual cycloaddition. The present stereoselective and regioselective cycloaddition provides a convenient preparative route to trans,trans-configured 1,2,3-trisubstituted indanes, in which the benzene ring derives from the arenesulfonyl functionality of the bis(sulfonyl)iodonium ylide
A Facile Diastereoselective Synthesis of Functionalized 1,2,3-Trisubstituted Benzocyclopentenes through the Cycloaddition of Bis(phenylsulfonyl)iodonium Ylides to Cyclic Alkenes
作者:Waldemar Adam、Efstathios P. Gogonas、Lazaros P. Hadjiarapoglou
DOI:10.1021/jo035362e
日期:2003.11.1
The thermal cycloaddition of beta-disulfonyl iodonium ylides to cyclic alkenes affords exclusively 1,2,3-trisubstituted cis(1,2)/cis(2,3)-configured benzocyclopentenes by an electrophilic attack of the ylide on the olefinic double bond. This unsual transformation provides a convenient and direct method for the diastereoselective synthesis of functionalized bicyclo[3.3.0]octanes (characteristic structural
Alkenyl C–H insertion of a β-disulfone iodonium ylide into flavones
作者:Waldemar Adam、Efstathios P Gogonas、Lazaros P Hadjiarapoglou
DOI:10.1016/j.tet.2003.07.011
日期:2003.9
The reaction of phenyliodoniumbis(phenylsulfonyl)methylide with flavones affords insertion products into the alkenyl carbon–hydrogen bond of the flavone, presumably by an electrophilic attack of the iodoniumylide on the double bond of the flavone.
Transylidations with Phenyliodonium Bis(aryl/alkylsulfonyl) Methylides
作者:Lazaros Hadjiarapoglou、Anastassios Varvoglis
DOI:10.1055/s-1988-27753
日期:——
The title compounds have been used to prepare a stable triethoxyphosphonium ylide and also several new ylides of pyridine, triphenylphosphine, triphenylarsine and some sulfur compounds.
Reactivity of phenyliodonium bis(arylsulphonyl)methylides towards alkenes and alkynes: crystal structure of 9-phenylsulphonyl-1,2,3,4,4a,9a-hexahydro-1,4- methanofluorene
作者:Lazaros Hatjiarapoglou、Anastassios Varvoglis、Nathaniel W. Alcock、Graham A. Pike
DOI:10.1039/p19880002839
日期:——
Thermal or photochemical reactions of phenyliodonium bis(arylsulphonyl)methylides with alkenes lead normally to gem-(arylsulphonyl)cyclopropanes. Norbornene and trans-stilbene, however, afford 1-(phenylsulphonyl)indane derivatives. The crystal structure of the title compound R= 0.038 for 3 468 unique observed reflections [I/σ(I) 3.0]} confirmed the identity of the product with norbornene. Diarylacetylenes