Backer; Strating, Recueil des Travaux Chimiques des Pays-Bas, 1943, vol. 62, p. 815,819
作者:Backer、Strating
DOI:——
日期:——
Enzymatic kinetic resolution of 1,1-dioxo-2,3-dihydro-1H-1λ6-thiophen-3-ol via temporary derivatisation
作者:Ben S. Morgan、Stanley M. Roberts、Paul Evans
DOI:10.1016/j.tetlet.2006.05.153
日期:2006.7
Following the thio-conjugate addition of (+/-)-9, its enantiomers were extremely efficiently discriminated using Novozym 435 (R). The thio-differentiating unit may then be removed either under reductive conditions, using Raney nickel, or following an oxidation-elimination sequence. In this manner enantioenriched derivatives of 1,1-dioxo-2,3-dihydro-1H-1 lambda(6)-thiophen-3-ol 9 may be accessed. (c) 2006 Elsevier Ltd. All rights reserved.
ALBINI, F. M.;CEVA, P.;MASCHERPA, A.;ALBINI, E.;CARAMELLA, P., TETRAHEDRON, 1982, 38, N 24, 3629-3639
作者:ALBINI, F. M.、CEVA, P.、MASCHERPA, A.、ALBINI, E.、CARAMELLA, P.
regioselective cycloaddition to benzonitrile oxide. In the reaction with the less reactive mesitonitrile oxide the sulfur dioxide deriving from the dimerization of the dipolarophile causes a catalytic decomposition of the nitrileoxide, which competes with the cycloaddition. Benzothiophene-1,1-dioxide and the vinyl sulfone system of 2,3-dihydrothiophene-1,1-dioxide and nitrileoxides with lower regioselectivity