Preparation and palladium-catalysed cross-coupling reactions of 3- and 4-tributylstannylfuran-2(5H)-ones
作者:Gregory J. Hollingworth、Gemma Perkins、Joseph Sweeney
DOI:10.1039/p19960001913
日期:——
Stannylfuranones 1 and 2 were prepared by ipso radical desulfurative stannylation of phenylsulfanylfuranones 3 and 16. Compounds 1 and 2 underwent Stille coupling reactions with aryl iodides to give 3- and 4-arylfuran-2(5H)-ones.
Multisubstituted α,β-Unsaturated γ-Lactones from 1-Chlorovinyl p-Tolyl Sulfoxides and tert-Butyl Carboxylates Using Pummerer-Type Cyclization as the Key Reaction
作者:Tsuyoshi Satoh、Takashi Katae、Shimpei Sugiyama
DOI:10.1055/s-0030-1259987
日期:2011.5
The addition reaction of 1-chlorovinyl p-tolyl sulfoxides, derived from aldehydes and chloromethyl p-tolyl sulfoxide, with the lithium enolate of tert-butyl carboxylates gave adducts in quantitative yields. Treatment of the adducts with trifluoroacetic anhydride in the presence of sodium iodide resulted in the formation of γ-lactones bearing a p-tolylsulfanyl group at the γ-position through Pummerer-type cyclization. Oxidation of the sulfanyl group to the sulfinyl group followed by thermal syn-elimination gave α,β-unsaturated γ-lactones (γ-butenolides) in moderate to good yields. Trapping the intermediates of the addition reaction with iodoalkanes gave alkylated adducts, from which α,γ- and β,γ-disubstituted γ-butenolides were obtained. These procedures provide a good way to synthesize multisubstituted γ-butenolides from aldehydes.
Palladium-Catalyzed Cross-Coupling Reactions of 4-Tosyl-2(<i>5H</i>)-furanone with Boronic Acids: A Facile and Efficient Route to Generate 4-Substituted 2(<i>5H)</i>-Furanones
作者:Jie Wu、Qiang Zhu、Lisha Wang、Reza Fathi、Zhen Yang
DOI:10.1021/jo020640f
日期:2003.1.1
An efficient and facilesynthesis of 4-substituted 2(5H)-furanones using palladium catalyzed cross-coupling reactions between 4-tosyl-2(5H)-furanone and boronic acids is reported herein.
Efficient Route to 4-Substituted-2(5<i>H</i>)-furanones, 2(1<i>H</i>)-quinolones, and pyrones by Nickel-catalyzed Cross-coupling of Arenesulfonates with Organozinc Reagents
作者:Jie Wu、Xiaoyu Sun、Liang Zhang
DOI:10.1246/cl.2005.796
日期:2005.6
Nickel(II)-catalyzed cross-coupling reactions of 4-tosyl-2(1H)-quinolone, pyrone, and 2(5H)-furanone with various organozincreagents provide an efficient and practical method for the high-yielding...
镍 (II) 催化的 4-甲苯磺酰基-2(1H)-喹诺酮、吡喃酮和 2(5H)-呋喃酮与各种有机锌试剂的交叉偶联反应为高产...
Preparation and reactions of 3,4-bisstannyl-2(5H)furanones
作者:Neil B Carter、Ross Mabon、Alexandre M.E Richecœur、J.B Sweeney
DOI:10.1016/s0040-4020(02)00995-x
日期:2002.10
Bistributylstannyl-2(5H)-furanone 4a has been prepared from 3-(tetrahydropyran-2-yl)oxy but-2-ynoate and shown to exhibit good selectivity in its Stille reactions with a range of halogenated compounds, leading to 4-substituted-3-stannyl-2(5H)-furanones, in generally moderate yield. Under certain reaction conditions, doubly substituted products were also isolated from the reactions. The 3,4-bistrimethylstannyl