- Pummerer reaction of sulfoxides in acetic anhydride catalyzed by Al-MCM-41
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The Pummerer reaction of acetic anhydride with both alkyl aryl sulfoxides and dialkyl sulfoxides was efficiently promoted by a mesoporous aluminosilicate Al-MCM-41 to afford the corresponding α-acetoxy sulfides in high yields. The catalyst was easily reco
- Ito, Suguru,Kubota, Yoshihiro,Asami, Masatoshi
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- EFFECT OF MOLECULAR STRUCTURE ON OPTICAL PROPERTIES OF SULFOXIDE SYSTEMS. 2-(4'-BROMOBENZYLSULFINYL)BENZOIC ACIDS AND SOME OF THEIR DERIVATIVES. PART II
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The synthesis and principal properties of 2-(4'-bromobenzylsulfinyl and sulfonyl)benzoic acids are described.Racemic sulfoxide was resolved by fractional crystallization of its brucine diastereomeric salts.The relative configurations of the enantiomers were elucidated.Optical rotatory dispersion of the laevorotatory enantiomer, its esters and methylamide in the region 360 a, ΔS(excit.), ΔH(excit.)) of racemization of dextrorotatory 2-(4'-bromobenzylsulfinyl)benzoic acid were determined by the classical kinetic methods.A stereoselective rearrangement of laevorotatory 2-(4'-bromobenzylsulfinyl)-benzoic acid to dextrorotatory 3-(4'-bromophenyl)-4-thiaisochroman-1-one is described.
- Janczewski, Marian,Jurczak, Janusz,Majewski, Wladyslaw
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p. 1205 - 1218
(2007/10/02)
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- STUDIES ON ORGANOPHOSPHORUS COMPOUNDS. THIATION OF 3,1-BENZOXATHIAN-4-ONES. NEW ROUTES TO 1,2-BENZISOTHIAZOLE-3(2H)-THIONES AND 3H-1,2-BENZODITHIOL-3-IMINES
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3,1-Benzoxathian-4-ones, 2, when heated with 2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane-2,4-disulfide, 1, or with P4S10 give one or more of the following products: 3,1-benzoxathian-4-thione, 3, 1,3-benzodithian-4-one, 4, 1,3-benzodithian-4-thion
- El-Barbary, A. A.,Clausen, K.,Lawesson, S.-O.
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p. 3309 - 3316
(2007/10/02)
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