Preparation of 1-phenylsulphonyl-1-phenylthio epoxide: Convenientprecursors to α-halo S-phenyl thio esters
作者:Cheryl T. Hewkin、Richard F.W. Jackson、William Clegg
DOI:10.1016/s0040-4039(00)80635-8
日期:1988.1
1-Phenylsulphonyl-1-phenylthio epoxides (3), readily prepared from aldehydes, react with lithium or magnesium halides to give high yields of the corresponding α-halo S-phenylthioesters.
Preparation and ring-opening reactions of 2-phenylsulphonyl-2-trimethylsilyl-oxiranes
作者:Cheryl T. Hewkin、Richard F.W. Jackson
DOI:10.1016/s0040-4039(00)98809-9
日期:1990.1
trimethylsilyl oxiranes(2), which on treatment with MgBr2Et2O gave 2-bromoacylsilanes(3) and either bromovinyl sulphones(5) or α,β-unsaturated acylsilanes(6) and 2-trimethylsilyl car☐ylic acids(7), depending on structure.
在氯代三甲基硅烷存在下,2-苯基磺酰基肟基(1)与丁基锂反应生成2-苯基磺酰基-2-三甲基甲硅烷基肟基(2),经MgBr 2 Et 2 O处理后生成2-溴酰基硅烷(3)和两种溴化砜基( 5)或α,β-不饱和酰基硅烷(6)和2-三甲基甲硅烷基羧基丙烯酸(7),具体取决于结构。
A convergent regiospecific synthesis of zirconium enolates
作者:Aleksandra Kasatkin、Richard J. Whitby
DOI:10.1016/j.tet.2003.09.022
日期:2003.12
α-Lithiated phenylsulphonyloxiranes insert into alkenylzirconocene chlorides with loss of phenylsulphinate to give zirconyloxiranes which smoothly rearrange by either α- or β- C–O cleavage to afford regiodefined zirconium enolates which may be further elaborated.
Synthesis and crystal structures of 2-substituted-2-phenylsulfonyloxiranes: evidence for a generalised anomeric effect in 2-phenylsulfonyloxiranesElectronic supplementary information (ESI) available: PDB files of the crystal structures of compounds 5, 6b and 7. See http://www.rsc.org/suppdata/ob/b3/b301409f/
作者:Richard F. W. Jackson、Sara F. C. Dunn、Andrew McCamley、William Clegg
DOI:10.1039/b301409f
日期:——
Crystal structures are reported for three new sulfonyloxiranes 5, 6b and 7. Taken together with the structures previously reported for the two sulfonyloxiranes 1 and 2, these structures provide evidence of the existence of a generalised anomeric effect in 2-phenylsulfonyloxiranes, accounting for the substantial bond asymmetry in the oxirane ring, and thus for the reactivity of these oxiranes towards nucleophiles.