1587-07-1Relevant academic research and scientific papers
Carbonylative Transformation of Allylarenes with CO Surrogates: Tunable Synthesis of 4-Arylbutanoic Acids, 2-Arylbutanoic Acids, and 4-Arylbutanals
Wu, Fu-Peng,Li, Da,Peng, Jin-Bao,Wu, Xiao-Feng
supporting information, p. 5699 - 5703 (2019/08/01)
In this Communication, procedures for the selective synthesis of 4-arylbutanoic acids, 2-arylbutanoic acids, and 4-arylbutanals from the same allylbenzenes have been developed. With formic acid or TFBen as the CO surrogate, reactions proceed selectively and effectively under carbon monoxide gas-free conditions.
Palladium-Catalyzed meta-C-H Olefination of Arene-Tethered Diols Directed by Well-Designed Pyrimidine-Based Group
Fang, Siqiang,Wang, Xiaobing,Yin, Fucheng,Cai, Pei,Yang, Huali,Kong, Lingyi
supporting information, (2019/03/19)
The palladium-catalyzed meta-olefination of arene-tethered diols attached to a well-designed pyrimidine moiety is presented. Applications of the protocol are illustrated by the synthesis of various diol-based natural products, such as coumarins, phenylpropanoids, stilbenes, and chalcones. Advantages of this method are demonstrated through the easy removal of the template and a gram-scale olefination reaction. Finally, experimental verification, including 1H NMR, ESI-MS and IR, and DFT studies are undertaken to elucidate the mechanistic complexity.
Cross-Coupling Reactions of Aryldiazonium Salts with Allylsilanes under Merged Gold/Visible-Light Photoredox Catalysis
Akram, Manjur O.,Mali, Pramod S.,Patil, Nitin T.
supporting information, p. 3075 - 3078 (2017/06/23)
A method for the cross-coupling reactions of aryldiazonium salts with trialkylallylsilanes via merged gold/photoredox catalysis is described. The reaction is proposed to proceed through a photoredox-promoted generation of an electrophilic arylgold(III) intermediate that undergoes transmetalation with allyltrimethylsilane to form allylarenes.
Efficient double bond migration of allylbenzenes catalyzed by Pd(OAc) 2-HFIP system with unique substituent effect
Nishiwaki, Nagatoshi,Kamimura, Ryuichiro,Shono, Kimihiro,Kawakami, Toshihiko,Nakayama, Katsuhisa,Nishino, Kohei,Nakayama, Takayuki,Takahashi, Keisuke,Nakamura, Aki,Hosokawa, Takahiro
supporting information; experimental part, p. 3590 - 3592 (2010/08/19)
A novel catalyst system of Pd(OAc)2-HFIP induces double-bond migration of allylbenzenes under mild conditions with low catalytic loading to afford 1-propenylbenzenes. The reaction shows a unique substituent effect that is highly dependent on the distance of substituents from the allylic moiety. Thus, the reactivity of substrates bearing a methyl group is ordered in para > meta > ortho, whereas it is entirely reversed as ortho > meta > para for methoxy and chloro substituents.
Phosphazene base-promoted halogen-zinc exchange reaction of aryl iodides using diethylzinc
Ueno, Masahiro,Wheatley, Andrew E. H.,Kondo, Yoshinori
, p. 3549 - 3550 (2008/09/19)
The use of catalytic t-Bu-P4 base dramatically improved the performance of halogen-zinc exchange of aryl iodides, and the arylzinc derivatives were functionalized under copper-free reaction conditions. The Royal Society of Chemistry 2006.
Intermolecular heck-type coupling of aryl iodides and allylic acetates
Mariampillai, Brian,Herse, Christelle,Laufens, Mark
, p. 4745 - 4747 (2007/10/03)
(Chemical Equation Presented) A palladium-catalyzed arylation of allylic acetates followed by β-acetoxy elimination was shown to produce Heck-type coupling products. Optimal reaction conditions employed ligand-free palladium on carbon in the presence of tetrabutylammonium chloride, a trialkylamine base, and water.
Direct Allylation of Aromatic Compounds with Allylic Chloride using the Supported Reagents System ZnCl2/SiO2-K2CO3/Al2O3
Kodomari, Mitsuo,Nawa, Satoru,Miyoshi, Tadahiro
, p. 1895 - 1896 (2007/10/02)
Although the reaction of aromatic compounds with allylic chlorides using ZnCl2/SiO2, gives 2-chloro-1-arylalkanes accompanied with diarylalkanes, similar reaction using ZnCl2/SiO2-K2CO3/Al2O3 produces the monoallylated compound as the major product in good yield.
Tandem Cyclization-Cycloaddition Reaction of Rhodium Carbenoids. Studies Dealing with Intramolecular Cycloadditions
Padwa, Albert,Hornbuckle, Susan F.,Fryxell, Glen E.,Zhang, Zhijia J.
, p. 5747 - 5757 (2007/10/02)
A series of 5-alkenyl-1-diazo-2,5-pentanediones, when treated with a catalytic quantity of rhodium(II) acetate, were found to give cycloadducts derived from the intramolecular trapping of a carbonyl ylide intermediate.Tethers of three or four methylenes r
Octahedral metal carbonyls LXV. Olefin isomerization in (2-allylphenyldiphenylphosphine)tetracarbonyltungsten(0)
Wang, I-Hsiung,Dobson, Gerard R.
, p. 77 - 84 (2007/10/02)
The stepwise displacement of pip (=piperidine) from cis-(pip)2W(CO)4 by 2-allylphenyldiphenylphosphine (adpp) affords cis(η3-adpp)W(CO)4 (1) when the cis-(pip)(η1-adpp)W(CO)4 intermediate (2; adpp is P-bonded) is isolated and purifie
Intramolecular Ring Closure Reactions of Cyclopropene Derivatives as a Method for Synthesizing Novel Tricyclic Ring Compounds
Padwa, Albert,Rieker, William F.,Rosenthal, Robert J.
, p. 1353 - 1360 (2007/10/02)
The thermal and photosensitized reactions of several 4-(methyldiphenylcyclopropenyl)-1-butenes have been studied.The thermolysis of these systems gave substituted tricyclo2,7>heptanes in good yield.The formation of this ring system invo
