110522-97-9Relevant articles and documents
Synthesis of 5-arylthiouridines via electrophilic substitution of 5- bromouridines with diaryl disulfides
Hirota, Kosaku,Tomishi, Tetsuo,Maki, Yoshifumi,Sajiki, Hironao
, p. 161 - 173 (2007/10/03)
Novel synthetic method of 5-arylthiouridine derivatives is described. Treatment of 5-bromo-2',3'-O-isopropylideneuridine (1a) with diaryl disulfides in the presence of sodium hydride at ambient temperature gave the 5-arylthiouridines (2) in moderate yields. The present method is devised by virtue of a combination of efficient participation of the 5'-hydroxy group onto the uracil ring and the electrophilic nature of diaryl disulfide, which was applied to the synthesis of 5-arylthio-1-β-D-arabinofuranosyluracils (8).
A SIMPLE AND GENERAL ENTRY TO 5-SUBSTITUTED URUDINES BASED ON THE REGIOSELECTIVE LITHIATHION CONTROLLED BY A PROTECTING GROUP IN THE SUGAR MOIETY
Hayakawa, Hiroyuki,Tanaka, Hiromichi,Obi, Kikoh,Itoh, Masayuki,Miyasaka, Tadashi
, p. 87 - 90 (2007/10/02)
Lithiathion of 2',3',5'-tris-O-(tert-butyldimethylsilyl)uridine with sec-BuLi/TMEDA occurs at the C-5 position with a high regioselectivity and subsequent reactions of the resulting C-5 lithiated species with a variety of electrophiles provides a general entry to 5-substituted uridines.