Preparation of 2-halogeno S-phenyl thioesters from 2-phenylsulphony -2-phenylthiooxiranes. Crystal structures of 2-phenylsulphonyloxiranes
作者:Cheryl T. Hewkin、Richard F. W. Jackson、William Clegg
DOI:10.1039/p19910003091
日期:——
the preparation of 3,3-dialkyl2-phenylsulphonyl-2-phenylthiooxiranes. The oxiranes 4 react with lithium or magnesium halides to give good yields of 2-halogeno S-phenyl thioesters 5, 6 and 7. 2-lodo S-phenyl thioesters 7 are deiodinated by further treatment with magnesium iodide. In an analogous manner, 2-bromo Smethyl thioesters 15 and a 2-bromo Se-phenyl selenoester 17b are also prepared from the
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.
House-Meinwald rearrangement of aryl-substituted epoxysulfones in hexafluoroisopropanol (HFIP)
作者:Alexandria Uritis、Hannah Phillips、Hunter Phillips、Thomas C. Coombs
DOI:10.1016/j.tetlet.2023.154716
日期:2023.9
β-Aryl-substituted α,β-epoxysulfones undergo House-Meinwald rearrangement to form α-aryl, α-sulfonyl aldehydes in high yields upon dissolution in hexafluoroisopropanol (HFIP), and in some cases, heating. These compounds are typically isolated as the corresponding alcohols following reduction with NaBH4. The β-aryl group is generally required for rearrangement and a variety of substitution patterns