3-methyl-1,5,2,4-dioxadithiepane 2,2,4,4-tetraoxide

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The reaction procedure described in Example XIII for the preparation of trimethylene 1,1-ethanedisulfonate was followed, substituting for the 1,3-propane diol used in Example XIII, ethylene glycol (5.0 gram, 0.008 mole). The reaction mixture was stirred for 3 hours at room temperature, the solid amine hydrochloride residue removed, and the filtrate roto-evaporated to remove glyme. The crude product obtained was redissolved in a minimum amount of methylene chloride, and subsequent addition of cyclohexane produced white crystals immediately. Several crops of crystals totaling 5.84 grams were obtained after further addition of cyclohexane and refrigeration. Further recrystallization of the material resulted in a total of 4.37 grams of product, representing a 25.2% yield. The product melting point was between 92° C. and 93° C. Product identification was confirmed by IR spectral features relating to CH3CH and SO2 and proton NMR features relating to CH, CH2 and CH3. The reaction procedure the solid amine hydrochloride residue removed the filtrate roto-evaporated to remove glyme The crude product obtained were obtained Further recrystallization of the material