2525-42-0Relevant articles and documents
The Diels-Alder Reaction of Furan and Phenylsulphonylpropadiene. The Simple Base Induced Rearrangement of 3-Methylene-2-endo-phenylsulphonyl-7-oxabicyclohept-5-ene
Guildford, Allen J.,Turner, Ralph W.
, p. 466 - 467 (1983)
The Diels-Alder reaction of furan and phenylsulphonylpropadiene gives predominantly the 7-oxabicycloheptene (1), whose hydrogenation products (3) and (4) provide a simple entry to the synthesis of substituted cyclohexenols.
Generation of 1,2-oxathiolium ions from (arysulfonyl)- and (arylsulfinyl)allenes in Br?nsted acids. NMR and DFT study of these cations and their reactions
Lozovskiy, Stanislav V.,Ivanov, Alexander Yu.,Khoroshilova, Olesya V.,Vasilyev, Aleksander V.
, p. 2897 - 2906 (2018/12/13)
In strong Br?nsted acids (CF3SO3H, FSO3H, D2SO4), (arysulfonyl)allenes (ArSO2-CR1=C=CR2R3) and (arylsulfinyl)allenes (ArSO-CR1=C=CR2R3) undergo cyclization into the corresponding stable 1,2-oxathiolium ions, which were studied by means of NMR and DFT calculations. Quenching of solutions of these cations with low nucleophilic media, aqueous HCl, leads to their deprotonation with a stereoselective formation of (arysulfonyl)butadienes (for instance, ArSO2-CR1=C-C(Me)=CH2, for R2 = R3 = Me, yields of 87-98%). Reactions of (arysulfonyl)allenes in the system TfOH (0.1 equiv)-HFIP (hexafluoropropan-2-ol) followed by hydrolysis give rise to allyl alcohols (ArSO2-CR1=CH-C(OH)R2R3, yields of 78-99%). Reflux of solutions of (arysulfonyl)allenes in the presence of TfOH (1 equiv) in 1,2-dichlorobenzene leads to the cyclization into thiochromene 1,1-diox-ides in high yields. Under the action of TfOH or AlX3 (X = Cl, Br) followed by hydrolysis of reaction mixtures, (arylsulfinyl)allenes give allyl alcohols (ArSO2-CR1=CH-C(OH)R2R3). Plausible reaction mechanisms have been proposed for all studied reactions.
Sulfinate-Organocatalyzed (3+2) Annulation of Allenyl Sulfones with 1,1-Dicyano Olefins in the Presence of a Quaternary Ammonium Phase Transfer Agent
Martzel, Thomas,Lohier, Jean-Fran?ois,Gaumont, Annie-Claude,Brière, Jean-Fran?ois,Perrio, Stéphane
supporting information, p. 2696 - 2706 (2018/07/29)
The benzenesulfinate-catalyzed (3+2) annulation between allenyl sulfones and aryl(alkyl)idenemalononitriles has been developed under mild phase transfer conditions, affording a breadth of functionalized sulfonyl cyclopentenes in good to excellent yields (