scholarly journals Cleavage of the methylenedioxy group with sodium methoxide in dimethyl sulfoxide.

1978 ◽  
Vol 26 (10) ◽  
pp. 3113-3116 ◽  
Author(s):  
SHIGERU KOBAYASHI ◽  
MASARU KIHARA ◽  
YOSHINOBU YAMAHARA
Keyword(s):  
Dimethyl Sulfoxide ◽  
Sodium Methoxide ◽  
Methylenedioxy Group

ChemInform Abstract: DEHALOGENATION OF 1-HALOTHIENYLDI- AND -TETRAHYDROISOQUINOLINES BY SODIUM METHOXIDE IN DIMETHYL SULFOXIDE

1985 ◽  
Vol 16 (23) ◽  
Author(s):  
J. M. BARKER ◽  
P. R. HUDDLESTON ◽  
J. CLEPHANE ◽  
M. L. WOOD ◽  
D. HOLMES
Keyword(s):  
Dimethyl Sulfoxide ◽  
Sodium Methoxide

Preparation of the 2,3-anhydro-4,6-O-benzylidene derivatives of methyl α- and β-D-talopyranoside and of methyl α-D-gulopyranoside

1980 ◽  
Vol 33 (5) ◽  
pp. 1021 ◽  
Author(s):  
JL Frahn
Keyword(s):  
Dimethyl Sulfoxide ◽  
Sodium Methoxide ◽  
Room Temperature ◽  
Derivatives Of

Instructions are given for preparing the title compounds in reproducibly good yields from the appropriate anomer of methyl 4,6-O-benzylidene-2,3-di-O-tosyl-D-galactopyranoside. The α-anomer is converted into a mixture of the anhydro-α-taloside and anhydro-α- guloside by reaction with sodium methoxide in dimethyl sulfoxide as solvent at room temperature. The β-anomer forms the anhydro-β-taloside under similar conditions but with dioxan as solvent for the reactants.

Dissociation of Amides in Strongly Basic Medium of Sodium Methoxide in Dimethyl Sulfoxide-Methanol Mixtures

1997 ◽  
Vol 62 (10) ◽  
pp. 1562-1576
Author(s):  
Petr Mitaš ◽  
Jaromír Kaválek ◽  
Oldřich Pytela
Keyword(s):  
Dimethyl Sulfoxide ◽  
Sodium Methoxide ◽  
Dissociation Constants ◽  
Basic Medium ◽  
Acidity Function

The dissociation constants of eleven amides have been measured in methanol and its mixtures with dimethyl sulfoxide (10 to 80% v/v) using sodium methoxide as the base. The experimental dissociation constants have been used to construct the H- acidity function as a function of methoxide concentration and composition of the DMSO-MeOH mixture as well as function of methoxide concentration in methanol. Moreover, with the help of construction of acidity function, the functions have been devised for constant sodium methoxide concentrations (0.025, 0.1, and 0.2 mol l-1) and changing composition of the DMSO-MeOH mixture.

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