Study of the anomeric effect in 2-substituted 1,3-dithianes
作者:Eusebio Juaristi、Josefina Tapia、Rodolfo Mendez
DOI:10.1016/s0040-4020(01)87344-0
日期:1986.1
The conformationalanalysis of several 2-substituted 1,3-dithianes made possible the evaluation of S-C-Y anomericinteractions, where Y = SCH3, SC6H5, CO2CH3, CO6H5, CO2H and N(CH3)2. The relative magnitude of the effects observed for these groups [ΔG°dithiane(Y) - ΔGδ cyclohexane(Y)] can be explained in terms of the combined influence of dipole/dipole and two-electron stabilizing interactions (stereoelectronic
几个2-取代的1,3-二硫杂环丁烷的构象分析使SCY异头相互作用的评估成为可能,其中Y = SCH 3,SC 6 H 5,CO 2 CH 3,CO 6 H 5,CO 2 H和N(CH 3)2。可以用偶极/偶极和两电子稳定相互作用(立体电子效应)的综合影响来解释对这些基团[ΔG°二噻吩(Y)-ΔGδ环己烷(Y)]观察到的相对影响强度。
Labiad, B.; Villemin, D., Synthetic Communications, 1989, vol. 19, # 1, 2, p. 31 - 38
作者:Labiad, B.、Villemin, D.
DOI:——
日期:——
LABIAD, B.;VILLEMIN, D., SYNTH. COMMUN., 19,(1989) N-2, C. 31-38
作者:LABIAD, B.、VILLEMIN, D.
DOI:——
日期:——
JUARISTI, E.;TAPIA, J.;MENDEZ, R., TETRAHEDRON, 1986, 42, N 5, 1253-1264
作者:JUARISTI, E.、TAPIA, J.、MENDEZ, R.
DOI:——
日期:——
Enantioselective preparation of 2-substituted- 1,3-dithiane 1-oxides using modified sharpless sulphoxidation procedures
作者:Philip C. Bulman Page、Robin D. Wilkes、Emest S. Namwindwa、Michael J. Witty
DOI:10.1016/0040-4020(95)01029-7
日期:1996.2
carried out using modified Sharpless conditions to furnish the corresponding sulphoxides in optically enriched form. Deacylation of 2-acyl-1,3-dithiane 1-oxide derivatives allows the preparation of 2-alkyl-1,3-dithiane 1-oxides and the parent 1,3-dithiane 1-oxide itself in high enantiomeric excesses.