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.
A carboxyl-assisted C–H functionalization of acrylic acids with formaldehyde to give butenolides is described. It is the first time that the addition of an inert vinylic C–H bond to formaldehyde has been achieved via cobalt-catalyzed C–H activation. The unique reactivity of the cobalt species was observed when compared with related Rh or Ir catalysts. γ-Hydroxymethylated butenolides were produced by
描述了用甲醛对丙烯酸进行羧基辅助的 C-H 官能化以得到丁烯内酯。这是首次通过钴催化的 C-H 活化将惰性乙烯基 C-H 键添加到甲醛中。与相关的 Rh 或 Ir 催化剂相比,观察到钴物种的独特反应性。γ-羟甲基化丁烯内酯是通过Na 2 CO 3在一锅催化反应后处理制备的。
Reductive Carbonylation of Acetylenes under Water-Gas Shift Reaction Conditions. Synthethis of Furan-2(5H)-ones from Terminal and Non-substituted Acetylenes
Under water-gas reaction conditions terminal and non-substituted acetylenes are selectively converted into furan-2(5H)-ones by catalysis with a rhodium carbonyl cluster.
在水-气反应条件下,末端和未取代的乙炔通过羰基铑簇的催化选择性转化为呋喃-2(5H)-酮。
Preparation and reactions of 3- and 4-tributylstannyl-2-(5H)-furanones: Preparation of aryl furanones
作者:Gregory J. Hollingworth、J.B. Sweeney
DOI:10.1016/s0040-4039(00)60930-9
日期:1992.11
3- and 4-trialkylstannylfuranones (2) and (3) have been prepared by an interesting desulphurative stannylation reaction; 3- and 4-substituted 2-(5H)-Furanones (12) and (13) may be prepared via palladium-catalysed cross coupling of (2) and (3) with aryl iodides
A Modular and Scalable One-Pot Synthesis of Polysubstituted Furans
substituted furans by a one‐pot four‐step sequence featuring a palladium‐catalyzed decarboxylative allylic alkylation, a microwave‐mediated Cope rearrangement, a nucleophilic addition, and a dehydration reaction (see scheme). The protocol is operationally simple, highly flexible, and provides di‐, tri‐, and tetrasubstituted furans starting from readily available materials.