Nucleic acid-related compounds. 68. Fluorination at C5' of nucleoside 5'-thioethers with DAST/antimony(III) chloride or xenon difluoride to give 5'-S-aryl-5'-fluoro-5'-thiouridines
摘要:
Oxidation of 2',3'-di-O-acetyl-5'-S-(4-methoxyphenyl)-5'-thiouridine (2a) with 3-chloroperoxybenzoic acid (MCPBA) gave the diastereomeric sulfoxides 4a. Treatment of 2a with xenon difluoride or 4a with (diethylamino)sulfur trifluoride/antimony(III) chloride gave efficient conversions to the 2',3'-di-O-acetyl-5'-fluoro-5'-S-(4-methoxyphenyl)-5'-thiouridine diastereomers 6a. The stereochemistry and conformation of 6a(5'R) were established by X-ray crystallography. The alpha-fluoro thioethers were oxidized to their sulfoxide and sulfone derivatives with MCPBA, deprotected, and characterized.
Nucleic acid-related compounds. 68. Fluorination at C5' of nucleoside 5'-thioethers with DAST/antimony(III) chloride or xenon difluoride to give 5'-S-aryl-5'-fluoro-5'-thiouridines
摘要:
Oxidation of 2',3'-di-O-acetyl-5'-S-(4-methoxyphenyl)-5'-thiouridine (2a) with 3-chloroperoxybenzoic acid (MCPBA) gave the diastereomeric sulfoxides 4a. Treatment of 2a with xenon difluoride or 4a with (diethylamino)sulfur trifluoride/antimony(III) chloride gave efficient conversions to the 2',3'-di-O-acetyl-5'-fluoro-5'-S-(4-methoxyphenyl)-5'-thiouridine diastereomers 6a. The stereochemistry and conformation of 6a(5'R) were established by X-ray crystallography. The alpha-fluoro thioethers were oxidized to their sulfoxide and sulfone derivatives with MCPBA, deprotected, and characterized.
Robins, Morris J.; Wnuk, Stanislaw F., Phosphorus, Sulfur and Silicon and the Related Elements, 1994, vol. 96, # 1-4, p. 71 - 88
作者:Robins, Morris J.、Wnuk, Stanislaw F.
DOI:——
日期:——
Nucleic acid-related compounds. 68. Fluorination at C5' of nucleoside 5'-thioethers with DAST/antimony(III) chloride or xenon difluoride to give 5'-S-aryl-5'-fluoro-5'-thiouridines
作者:Morris J. Robins、Stanislaw F. Wnuk、Khairuzzaman B. Mullah、N. Kent Dalley
DOI:10.1021/jo00024a033
日期:1991.11
Oxidation of 2',3'-di-O-acetyl-5'-S-(4-methoxyphenyl)-5'-thiouridine (2a) with 3-chloroperoxybenzoic acid (MCPBA) gave the diastereomeric sulfoxides 4a. Treatment of 2a with xenon difluoride or 4a with (diethylamino)sulfur trifluoride/antimony(III) chloride gave efficient conversions to the 2',3'-di-O-acetyl-5'-fluoro-5'-S-(4-methoxyphenyl)-5'-thiouridine diastereomers 6a. The stereochemistry and conformation of 6a(5'R) were established by X-ray crystallography. The alpha-fluoro thioethers were oxidized to their sulfoxide and sulfone derivatives with MCPBA, deprotected, and characterized.