Mercuracarborand-catalyzed Diels-Alder reactions of a thionoester with cyclopentadiene
摘要:
The multidentate Lewis acids B-octamethyl [12]-mercuracarborand-4 (1) and B-hexamethyl [9]-mercuracarborand-3 (2) catalyze the Diels-Alder reaction of a thionoester 4 with cyclopentadiene. The reaction proceeds more rapidly when catalyzed with 1 and 2 than with monodentate bis(closo-9,12-dimethyl-1,2-carboran-1-yl)mercury (3). Mercury-199 NMR studies demonstrated the formation of a 1:1 complex of 1 with 4 in which the thio function of 4 is coordinated to the HE(II) centers of 1, while the 2.4 and 3.4 complexes are not observed by NMR. (C) 1999 Elsevier Science Ltd. All rights reserved.
A Simple Route to 2-Alkenethioic<i>O</i>-Esters and 2-Alkenedithioic Esters [Thiono- and Dithioesters, 37]
作者:K. Hartke、O. Kunze、W. Hoederath
DOI:10.1055/s-1985-31402
日期:——
The reaction of the copper(I) derivative of dimethyl methanephosphonic ester with O-alkyl carbonochloridothioates affords O-alkyl (dimethoxyphosphinyl)-thioacetates. These compounds as well as the corresponding dithioesters react with aldehydes in a Horner-Emmons reaction to give O-alkyl 2-alkenethioates or alkyl 2-alkenedithioates, respectively.
HARTKE, K.;KUNZE, O.;HOEDERATH, W., SYNTHESIS, BRD, 1985, N 10, 960-961
作者:HARTKE, K.、KUNZE, O.、HOEDERATH, W.
DOI:——
日期:——
Hartke, Klaus; Kunze, Olaf, Liebigs Annalen der Chemie, 1989, p. 321 - 330
作者:Hartke, Klaus、Kunze, Olaf
DOI:——
日期:——
Mercuracarborand-catalyzed Diels-Alder reactions of a thionoester with cyclopentadiene
作者:Hans Lee、Martin Diaz、M.Frederick Hawthorne
DOI:10.1016/s0040-4039(99)01582-8
日期:1999.10
The multidentate Lewis acids B-octamethyl [12]-mercuracarborand-4 (1) and B-hexamethyl [9]-mercuracarborand-3 (2) catalyze the Diels-Alder reaction of a thionoester 4 with cyclopentadiene. The reaction proceeds more rapidly when catalyzed with 1 and 2 than with monodentate bis(closo-9,12-dimethyl-1,2-carboran-1-yl)mercury (3). Mercury-199 NMR studies demonstrated the formation of a 1:1 complex of 1 with 4 in which the thio function of 4 is coordinated to the HE(II) centers of 1, while the 2.4 and 3.4 complexes are not observed by NMR. (C) 1999 Elsevier Science Ltd. All rights reserved.