Hydrolysis of 2'- and 3'-C-methyluridine 2',3'-cyclic monophosphates and interconversion and dephosphorylation of the resulting 2'- and 3'-monophosphates: comparison with the reactions of uridine monophosphates.
作者:S. N. Mikhailov、Mikko Oivanen、Pentti Oksman、Harri Lonnberg
DOI:10.1021/jo00041a014
日期:1992.7
2',3'-Cyclic monophosphates of 2'- and 3'-C-methyluridines have been prepared and shown to hydrolyze to a mixture of the corresponding 2'- and 3'-monophosphates. The predominant product isomer is the one having the tertiary hydroxyl group phosphorylated, but on longer treatment a phosphate migration from the tertiary to secondary hydroxyl function takes place. Hydrolytic dephosphorylation competes with the phosphate migration, the tertiary hydroxyl group being dephosphorylated 1 order of magnitude faster than the secondary one. Kinetics of the partial reactions have been described and compared to the data obtained with uridine 2',3'-cyclic monophosphate. The tertiary monophosphate has been shown to be exceptionally susceptible to nucleophilic attack of the neighboring hydroxyl group.
Synthesis and properties of 3′-C-methylnucleosides and their phosphoric esters
作者:Sergey N. Mikhailov、Leon N. Beigelman、Galyna V. Gurskaya、Nelly Sh. Padyukova、Gennady I. Yakovlev、Marat Ya. Karpeisky
DOI:10.1016/0008-6215(83)88357-8
日期:1983.12
Abstract 3′- C -Methyluridine and 3′- C -methylcytidine were synthesized in 11 steps starting from d -glucose. The conformation of 3′- C -methylnucleosides was studied in solution and in the crystal by using the techniques of c.d., 1 H-n.m.r. spectroscopy, and X-ray diffraction analysis. 3′- C -Methyluridine 2′,3′-cyclophosphate was prepared, and its hydrolysis with nucleases was studied. 3′- C -Methyluridine