16215-11-5Relevant articles and documents
Substitution of allylic acetates with sodium para-toluenesulfinate in aqueous media using allylpalladium chloride dimer and a water-soluble ligand as the catalytic system; electrospray ionisation mass spectrometry analysis
Chevrin, Carole,Le Bras, Jean,Roglans, Anna,Harakat, Dominique,Muzart, Jacques
, p. 121 - 126 (2007)
The allylic substitution of allylic acetates by sodium para- toluenesulfinate in aqueous media was catalyzed by [(η3-allyl) PdCl]2 associated with [(HOCH2CH2NHCOCH 2)2NCH2]2. High yields could be obtained but the recycling of the catalytic system proved to be weakly effective. ESI-MS analysis has led to the suggestion of a possible catalytic cycle involving a PdIV intermediate. The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.
Vinylethylene Carbonates as α,β-Unsaturated Aldehyde Surrogates for Regioselective [3 + 3] Cycloaddition
Xu, Yi,Chen, Lu,Yang, Yu-Wen,Zhang, Zhiqiang,Yang, Weibo
, p. 6674 - 6678 (2019/09/03)
Herein, we report a novel stepwise addition-controlled ring size method, to access tetrahydropyrimidines through an operationally simple [3 + 3] cycloaddition of vinylethylene carbonates with triazinanes. Interestingly, we could also use this method for a [3 + 3] oxidative cycloaddition, which allows the facile synthesis of polysubstituted terphenyls under mild conditions. Mechanistic studies suggest that vinylethylene carbonates could generate α,β-unsaturated aldehydes as 3-carbon synthons for cycloaddition via a combination process of Pd-catalyzed decarboxylation and β-H elimination.
Regioselective Single-Electron Tsuji-Trost Reaction of Allylic Alcohols: A Photoredox/Nickel Dual Catalytic Approach
Wang, Zheng-Jun,Zheng, Shuai,Romero, Eugénie,Matsui, Jennifer K.,Molander, Gary A.
supporting information, p. 6543 - 6547 (2019/08/26)
A radical-mediated functionalization of allyl alcohol derived partners with a variety of alkyl 1,4-dihydropyridines via photoredox/nickel dual catalysis is described. This transformation transpires with high linear and E-selectivity, avoiding the requirement of harsh conditions (e.g., strong base, elevated temperature). Additionally, using aryl sulfinate salts as radical precursors, allyl sulfones can also be obtained. Kinetic isotope effect experiments implicated oxidative addition of the nickel catalyst to the allylic electrophile as the turnover-limiting step, supporting previous computational studies.
Sodium Arenesulfinates-Involved Sulfinate Synthesis Revisited: Improved Synthesis and Revised Reaction Mechanism
Ji, Yuan-Zhao,Li, Hui-Jing,Zhang, Jin-Yu,Wu, Yan-Chao
, p. 1846 - 1855 (2019/02/14)
Reaction of alcohols with sodium arenesulfinates could afford either sulfones or sulfinates, and O-attack of sulfinate anions onto the in situ generated carbocation intermediates from alcohols was the previous proposed reaction mechanism in many syntheses of sulfinates. This concept, which is often used consciously or unconsciously, was revised herein by using isotopic labeling experiments and development of an improved sulfinate synthesis. The improved sulfinate synthetic protocol possesses many advantages such as a high sulfinate/sulfone selectivity, a broad substrate scope, metal-free, and mild reaction conditions. The revised reaction mechanism necessitates revision of many previous proposed reaction mechanisms in literatures.
Green and Scalable Palladium-on-Carbon-Catalyzed Tsuji–Trost Coupling Reaction Using an Efficient and Continuous Flow System
Cazorla, Clément,Billamboz, Muriel,Bricout, Hervé,Monflier, Eric,Len, Christophe
, p. 1078 - 1085 (2017/02/23)
The first continuous flow Tsuji–Trost coupling reaction between allylic compounds and various nucleophiles has been successfully achieved within only around 40 s during a single pass through a cartridge filled with palladium on carbon (Pd/C). Two methods have been designed by using the H-cube ThalesNano technology that enable the efficient production of added-value compounds on the gram scale with high productivity. Under the optimized conditions, the cartridge catalyst can be used for 60 min of continuous processing without a decrease in reactivity. A large range of substrates and nucleophiles have successfully been submitted to the standard methods, giving good-to-excellent yields and productivity.
Micellar catalysis using a photochromic surfactant: Application to the pd-catalyzed tsuji-trost reaction in water
Billamboz, Muriel,Mangin, Floriane,Drillaud, Nicolas,Chevrin-Villette, Carole,Banaszak-Leonard, Estelle,Len, Christophe
, p. 493 - 500 (2014/04/03)
The first example of a Pd-catalyzed Tsuji-Trost reaction, applied in a photochromic micellar media under conventional heating and microwave irradiation, is reported. The surfactant activity and recycling ability were investigated and compared with those of a few commercially available surfactants. The synthetic photochromic surfactant proved to be efficient, recyclable, and versatile for Pdcatalyzed coupling reactions.
Coupling reaction of magnesium alkylidene carbenoids with α-sulfonylallyllithiums: An efficient route to multi-substituted vinylallenes
Kimura, Tsutomu,Kobayashi, Gen,Ishigaki, Masashi,Inumaru, Mio,Sakurada, Jo,Satoh, Tsuyoshi
, p. 3623 - 3632 (2013/02/23)
A variety of vinylallenes were successfully synthesized from 1-chlorovinyl p-tolyl sulfoxides and allyl or vinyl sulfones. Allyl and vinyl sulfones served as α-sulfonylallyllithium sources were prepared from carbonyl compounds in three or four steps in good overall yields. The coupling reaction of α-sulfonylallyllithiums with magnesium alkylidene carbenoids, which were generated from 1-chlorovinyl p-tolyl sulfoxides and isopropylmagnesium chloride, afforded multi-substituted vinylallenes in up to 88% yield. Georg Thieme Verlag KG Stuttgart · New York.
Direct substitution of primary allylic amines with sulfinate salts
Wu, Xue-Song,Chen, Yan,Li, Man-Bo,Zhou, Meng-Guang,Tian, Shi-Kai
supporting information, p. 14694 - 14697 (2012/11/07)
The NH2 group in primary allylic amines was substituted directly by sulfinate salts with excellent regio- and stereoselectivities. In the presence of 0.1 mol % [Pd(allyl)Cl]2, 0.4 mol % 1,4- bis(diphenylphosphino)butane (dppb), and excess boric acid, a range of α-unbranched primary allylic amines were smoothly substituted with sodium sulfinates in an α-selective fashion to give structurally diverse allylic sulfones in good to excellent yields with exclusive E selectivity. Replacing dppb with 1,1′-bi-2-naphthol (BINOL) allowed unsymmetric α-chiral primary allylic amines to be transformed into the corresponding allylic sulfones in good to excellent yields with excellent retention of ee. Importantly, the reaction complements known asymmetric methods in substrate scope via its unique ability to provide α-chiral allylic sulfones with high optical purity starting from unsymmetric allylic electrophiles.
Synthesis of sulfones by iron-catalyzed decomposition of sulfonylhydrazones
Barluenga, Jose,Tomas-Gamasa, Maria,Aznar, Fernando,Valdes, Carlos
experimental part, p. 1520 - 1526 (2011/04/25)
The Fe-catalyzed decomposition of sulfonylhydrazones gives rise to sulfones. The reaction is quite general and allows the preparation of sulfones from a variety of aryl, alkyl, and α,β-unsaturated aldehydes and ketones. Crossover experiments reveal that the reaction is an intermolecular process, which may proceed by nucleophilic attack of the sulfinate anion on an iron carbene complex. Carbonyl compounds can be easily transformed into sulfones by Fe-catalyzed decomposition of the corresponding sulfonylhydrazones. The process most likely proceeds through an iron carbene complex and opens the door for the design of othernovel Fe-catalyzed reductive couplings. Copyright
An unexpected reaction of arenesulfonyl cyanides with allylic alcohols: Preparation of trisubstituted allyl sulfones
Reddy, Leleti Rajender,Hu, Bin,Prashad, Mahavir,Prasad, Kapa
experimental part, p. 172 - 174 (2009/04/10)
(Chemical Equation Presented) An efficient and practical protocol for the highly selective preparation of substituted allyl sulfones has been developed. Arenesulfonyl cyanides, Baylis-Hillman adducts, and simple allylic alcohols give an unforeseen outcome
