Selenosulfonation of allenes and subsequent rearrangement of the adducts: A facile synthetic route to β-arylsulfonyl-substituted allylic alcohols
作者:Young-Hee Kang、John L. Kice
DOI:10.1016/0040-4039(82)80132-9
日期:1982.1
areneselenosulfonates add readily to allenes in a highly regiospecific fashion (eq 3) to give . Oxidation of the PhSe group in to PhSe(O) is followed by [2,3]-sigmatropic rearrangement to and hydrolysis of to the β-arylsulfonyl-substituted allylicalcohol , thereby providing a simple, high-yield route to these interesting compounds.
Etude expérimentale et théorique de l'addition de l'acide hypochloreux sur les hydrocarbures alléniques
作者:J.-P. Bianchini、M. Cocordano
DOI:10.1016/s0040-4020(01)92917-5
日期:——
The addition of hypochlorous acid to allenic hydrocarbons leads, in all cases, to the fixation of the Cl atom on the central carbon and to the fixation of the OH group on the more substituted carbon. The (α-chloroketones which might be produced by the inverse fixation are not obtained. The utilisation of Hückel's method explains these results theoretically and satisfactorily.
Electrochemical oxidation of alkyl-substituted allenes in methanol
作者:James Y. Becker、Baruch Zinger
DOI:10.1016/0040-4020(82)80146-4
日期:1982.1
di- and tri-alkyl-substituted allenes were potentiostatically oxidized in methanol at graphite and Pt anodes. At the former electrode, α-methoxylated ketones (due to 4F/mole electricity consumption) and esters (6F/mole) were the major products. At a Pt anode, intermediate products such as vinyl-ether derivatives (2F/mole) were characterised too. Unlike the anodic oxidation of alkenes and alkynes previously
Etude de la cycloaddition du dimethylcetene aux allenes—I
作者:M. Bertrand、R. Maurin、J.L. Gras、G. Gil
DOI:10.1016/0040-4020(75)80090-1
日期:1975.1
Thermal cycloaddition of dialkylketenes to 1,2 dienes is a versatile synthetic route to conjugated alkylidenecyclobutanones. The central carbons of the allene and of the ketene react together resulting in a regiospecific addition.
free-radical addition to allenes (R1CHCCR2R3) to afford the regioisomer R1CH(SePh)C(SO2Ar)CR2R3 (13) arising from addition of the p-tolylsulfonyl group to the central carbon of the allene and transfer of the phenylseleno group to the less highly substituted of the two terminal carbons. This regioselectivity, which contrasts with that observed in the majority of radical additions to allenes, can be explained