Dihalodiphenylacetylenes are conveniently synthesized by a doubleelimination reaction of β-substituted sulfones which are readily obtained from halogen-substituted benzyl sulfone and benzaldehyde derivatives. Halogens can be incorporated at any desired positions in the diphenylacetylene skeleton simply by choosing the substitution position of the halogen on the aromatic rings of the starting compounds
Conversion of alkynes into 1,2-diketones using HFIP as sacrificial hydrogen donor and DMSO as dihydroxylating agent
作者:Raghuram Gujjarappa、Nagaraju Vodnala、V.P.R.K. Putta、Velma Ganga Reddy、Chandi C. Malakar
DOI:10.1016/j.tetlet.2019.151588
日期:2020.3
A metal-free and hypervalentiodine free conversion of internal alkynes into 1,2-diketo compounds has been described. The efficacy of the present protocol rely on the use of HFIP (1,1,1,3,3,3-Hexafluoro-2-propanol) as reducing agent of alkynes and DMSO as dihydroxylating agent of olefins to acquire the desired chemical transformations. The obtained 1,2-diketones were further transformed into useful
One-Pot Synthesis of Symmetrical and Unsymmetrical Bisarylethynes by a Modification of the Sonogashira Coupling Reaction
作者:Matthew J. Mio、Lucas C. Kopel、Julia B. Braun、Tendai L. Gadzikwa、Kami L. Hull、Ronald G. Brisbois、Christopher J. Markworth、Paul A. Grieco
DOI:10.1021/ol026266n
日期:2002.9.1
A modification of the Sonogoshira coupling reaction employing an amidine base and a substoichiometric amount of water generates symmetrical and unsymmetrical bisarylethynylenes in one pot through in situ deprotection of trimethylsilylethynylene-added intermediates.