Thietanyl protection in the synthesis of 1-alkyl-8-bromo-3-methyl-3,7-dihydro-1H-purine-2,6-diones
摘要:
The protection of the 7-NH group in 8-bromo-3-methyl-3,7-dihydro-1H-pyrine-2,6-dione during the synthesis of 7-ubsubstituted 1-alkyl-8-bromo-3-methyl-3,7-dihydro-1H-pyrine-2,6-diones with a thienyl group was applied that was introduced by the reaction with 2-chloromethylthiirane. The thietanyl protection was removed by treating with sodium alcoholate after the oxidation with hydrogen peroxide to thietane 1,1-dioxide group.
Thietanyl protection in the synthesis of 1-alkyl-8-amino-3-methyl-3,7-dihydro-1H-purine-2,6-diones
作者:F. A. Khaliullin、Yu. V. Shabalina、R. M. Sharafutdinov
DOI:10.1134/s1070428015100139
日期:2015.10
1-Alkyl-8-bromo-3-methyl-7-(1,1-dioxo-1 lambda(6)-thietan-3-yl)-3,7-dihydro-1H-purine-2,6-diones reacted with amines to give the corresponding 1-alkyl-8-amino-3-methyl-7-(1,1-dioxo-1 lambda(6)-thietan-3-yl)-3,7-dihydro-1H-purine-2,6-diones which were treated with sodium alkoxide to remove thietanyl protecting group with formation of 1-alkyl-8-amino-3-methyl-3,7-dihydro-1H-purine-2,6-diones possessing no substituent on N-7.
Thietanyl Protection in the Synthesis of 5-Aryloxy(sulfonyl)-3-bromo-1,2,4-triazoles
作者:F. A. Khaliullin、E. E. Klen、N. N. Makarova
DOI:10.1134/s1070428018120242
日期:2018.12
Previously unknown 5-aryloxy- and 5-benzenesulfonyl-3-bromo-1H-1,2,4-triazoles have been synthesized starting from 3,5-dibromo-1,2,4-triazole by successive alkylation with 2-chloromethylthiirane, nucleophilic substitution of the 5-bromine atom by phenoxy or phenylsulfanyl group, oxidation of the thietane sulfur atom with hydrogen peroxide, and removal of the thietanyl protecting group by treatment with sodium ethoxide.
Thietane ring as a novel protecting group
作者:F. A. Khaliullin、E. E. Klen
DOI:10.1134/s1070428009010187
日期:2009.1
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.
Thietanyl protection in the synthesis of 1-alkyl-8-bromo-3-methyl-3,7-dihydro-1H-purine-2,6-diones
作者:F. A. Khaliullin、Yu. V. Shabalina、R. M. Sharafutdinov
DOI:10.1134/s1070428010050167
日期:2010.5
The protection of the 7-NH group in 8-bromo-3-methyl-3,7-dihydro-1H-pyrine-2,6-dione during the synthesis of 7-ubsubstituted 1-alkyl-8-bromo-3-methyl-3,7-dihydro-1H-pyrine-2,6-diones with a thienyl group was applied that was introduced by the reaction with 2-chloromethylthiirane. The thietanyl protection was removed by treating with sodium alcoholate after the oxidation with hydrogen peroxide to thietane 1,1-dioxide group.