Tellurium in organic synthesis: a general approach to buteno- and butanolides
作者:Renan S. Ferrarini、Alcindo A. Dos Santos、João V. Comasseto
DOI:10.1016/j.tet.2012.09.074
日期:2012.12
The naturally occurring butanolides (−)-blastmycinolactol, (+)-blastmycinone, (−)-NFX-2, (+)-antimycinone as well as the four stereoisomers of the butenolide Acaterin were prepared in high enantiomeric purity using hydroxy-vinyl tellurides as starting materials.
C–F Bond Cleavage Enabled Redox-Neutral [4+1] Annulation via C–H Bond Activation
作者:Cheng-Qiang Wang、Lu Ye、Chao Feng、Teck-Peng Loh
DOI:10.1021/jacs.6b12142
日期:2017.2.8
α-difluoromethylene alkyne as a nontraditional one-carbon reaction partner, a synthetically novel method for the construction of isoindolin-1-one derivatives viaRh(III)-catalyzed [4+1] annulation reaction is reported. The 2-fold C-F bondcleavage not only enables the generation of desired product under an overall oxidant-free condition but also results in a net migration of carbon-carbontriplebond. In addition
Carbonyl transposition on organoselenium compounds
作者:João V. Comasseto、Wai L. Lo、Nicola Petragnani
DOI:10.1016/s0040-4020(97)00454-7
日期:1997.6
Carbonyl conjugated vinylic selenides undergo 1,3 and 1,5-carbonyl transposition sequences through organometallic reagents addition reactions followed by acid hydrolysis.
Organometallic reactions. Part X. The preparation and reactions of some alkynyl-lead compounds
作者:Alwyn G. Davies、R. J. Puddephatt
DOI:10.1039/j39680000317
日期:——
Trialkylalkynyl-lead compounds have been prepared by treating trialkyl-lead methoxides with alkynes, and by thermal decarboxylation of trialkyl-lead alkynylcarboxylates.
[Cp*Ir(PPh3)Cl2] with various internal acylalkynes in the presence of NaBArF 4 resulted in the selective formation of iridacycles via vinylidene rearrangement. 13C-labeling experiments revealed that the acyl group selectively migrates to the other acetylenic carbon atom. This trend is the same as that in the vinylidene rearrangement of internal alkynes at a group 8 metal center.