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
A Remarkable Cycloadditionof Bis(arylsulfonyl)iodonium Ylide with Norbornene Derivativesfor the Direct Synthesis of Functionalized Indanes
作者:Lazaros P. Hadjiarapoglou、Waldemar Adam、Efstathios P. Gogonas
DOI:10.1055/s-2003-39894
日期:——
The reaction of bis(arylsulfonyl)iodonium ylides with a variety of norbornenederivatives 3 affords functionalized indanes 4 in good yields through an unusual cycloaddition. This diastereoselective cycloaddition provides a convenient preparative route to multicyclic structures of well defined stereochemical configuration.
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.
The [3+2] cycloaddition of phenyliodonium bis(arylsulfonyl)methylides to α,β-enones affords exclusively TRANS, TRANS-configured 1-(arylsulfonyl)-2-aroyl-3-arylindanes. The initial electrophilic attack of the iodonium ylide on the alkenyl double bond of the chalcone, followed by cyclization of the dipolar species, and subsequent ejection of iodobenzene and sulfur dioxide, stereoselectively affords the