Friedel–Crafts reactions of acyl trifluoromethanesulfonates and cyclic acylsulfonium cations generated from acyl fluorides
作者:K.V. Raghavendra Rao、Yannick Vallée
DOI:10.1016/j.tet.2016.06.029
日期:2016.7
Reactive acyl trifluoromethanesulfonates are formed from the reaction of acyl fluorides with trimethylsilyl trifluoromethanesulfonate (TMSOTf). These electrophiles undergo Friedel–Crafts reactions with electron-rich aromatics at room temperature. When a sulfur atom is present at their γ position, their cyclization to acylsulfonium cations is observed and is followed by a rearrangement leading to benzothiepinones
Ketone Synthesis under Neutral Conditions. Cu(I) Diphenylphosphinate-Mediated, Palladium-Catalyzed Coupling of Thiol Esters and Organostannanes
作者:Rüdiger Wittenberg、Jiri Srogl、Masahiro Egi、Lanny S. Liebeskind
DOI:10.1021/ol034962x
日期:2003.8.1
[reaction: see text] A versatile approach to ketone synthesis is described. The reaction relies on the palladium-catalyzed, copper diphenylphosphinate-mediated coupling of thiol esters with organostannanes under neutral reaction conditions. This reaction complements the previously described coupling of thiol esters with boronic acids that used dual thiophilic-borophilic activation methodology.
申请人:The United States of America as represented by the Secretary of the Navy
公开号:US07161015B1
公开(公告)日:2007-01-09
A method of making a compound by: providing a furyl compound being 2-furoyl chloride or corresponding carboxylic acid, amide, ester, anhydride, or lactone; reacting the furyl compound with CH3O(CH3)NH.HCl to form an amide; reacting the amide with an alkane Grignard reagent or alkyllithium to form a chelated intermediate; and reacting the chelated intermediate with an aqueous acid to form a (2-furyl)-alkylketone.
A facile route to 5-alkyl-2(3H)-furanones by photoisomerisation of enedicarbonyl compounds
作者:M. D'Auria、A. De Mico、G. Piancatelli、A. Scettri
DOI:10.1016/0040-4020(82)80143-9
日期:1982.1
A new and useful synthesis of a title compounds is reported. They can be obtained easily by photocyclization of enedicarbonylcompounds 3 and 4. A different behaviour, ascribed to the geometry of a double bond, is observed; 3 are converted only to butenolides 5, while trans-isomers 4 are converted into alkyl-furyl-ketones 5 and 6. A possible mechanism is described.
Production of renewable oleo-furan surfactants by cross-ketonization of biomass-derived furoic acid and fatty acids
作者:Hannah Nguyen、Yunzhu Wang、David Moglia、Jiayi Fu、Weiqing Zheng、Marat Orazov、Dionisios G. Vlachos
DOI:10.1039/d0cy02349c
日期:——
of 2-dodecanoyl furan is a crucial step in the formulation of oleo-furan sulfonates as bio-surfactants from biomass-derived furans and vegetable-oil-derived molecules. Herein, cross-ketonization of 2-furoic acid and lauric acid is proposed to produce the bio-surfactant precursor. Among the commonly reported metal oxide ketonization catalysts, the inexpensive and abundant iron oxides are demonstrated
2-十二烷酰基呋喃的合成是从生物质衍生的呋喃和植物油衍生的分子制备油呋喃磺酸盐作为生物表面活性剂的关键步骤。在本文中,提出2-糠酸和月桂酸的交叉酮化以生产生物表面活性剂前体。在通常报道的金属氧化物酮化催化剂中,廉价且丰富的氧化铁被证明是有效且可回收的催化剂,在56%的月桂酸转化率下,对2-十二烷酰呋喃的选择性高达77%。通过X射线衍射,H 2程序升温还原和X射线光电子能谱对催化剂进行表征,表明Fe 3 O 4是催化活性且稳定的相。13Ç同位素示踪实验表明对Fe交叉酮化3 ö 4个前进通过一个β酮酸中间。