A novel protecting group for NH functionality of heterocycles, a thietane ring, was proposed. It can be readily introduced by alkylation of NH-heterocycles with 2-chloromethylthiirane. Removal of the thietane protecting group is performed via oxidation to thietane 1,1-dioxide with hydrogen peroxide in acetic acid and subsequent treatment with sodium alkoxide.
A novel protecting group for NH functionality of heterocycles, a thietane ring, was proposed. It can be readily introduced by alkylation of NH-heterocycles with 2-chloromethylthiirane. Removal of the thietane protecting group is performed via oxidation to thietane 1,1-dioxide with hydrogen peroxide in acetic acid and subsequent treatment with sodium alkoxide.
Unusual Reaction of 8-Bromo-3-methyl-7-(thietan-3-yl)3,7-dihydro-1H-purine-2,6-diones with Trisamine in Dimethylformamide
作者:F. А. Khaliullin、Yu. V. Shabalina
DOI:10.1134/s1070428020020049
日期:2020.2
The reaction of 8-bromo-substituted 3-methyl-7-(thietan-3-yl)-3,7-dihydro-1H-purine-2,6-diones with trisamine in DMF gave, instead of the expected 8-tris(hydroxymethyl)methylamino-substituted products, 8-dimethylamino-substituted 3-methyl-7-(thietan-3-yl)-3,7-dihydro-1H-purine-2,6-diones. The formation of unusual reaction products was explained by the initial reaction of DMF with trisamine to form dimethylamine and subsequent nucleophilic substitution reaction of the latter with the bromine atom.