Synthesis and phosphorus–sulphur bond cleavage of 3′-thiothymidylyl(3′-5′)thymidine
作者:Richard Cosstick、Joseph S. Vyle
DOI:10.1039/c39880000992
日期:——
The title compound is readily prepared from 5′-O-monomethoxytrityl-3′-thiothymidine (5); cleavage of the P–S bond can be accomplished by mild oxidative hydrolysis.
Synthesis and characterization of disulfide cross-linked oligonucleotides
作者:Ann E. Ferentz、Thomas A. Keating、Gregory L. Verdine
DOI:10.1021/ja00073a016
日期:1993.10
Disulfide cross-linked derivatives of the ''Dickerson/Drew dodecamer'' 5'-d(CGCGAATTCGCG)-3' and the related decamer 5'-d(GCGAATTCGC)-3' have been synthesized, each bearing a dithiobis(ethane) (C2) or dithiobis-(propane) (C3) cross-link at the central adenine (A). NMR and CD spectroscopy indicate that these duplexes are essentially undistorted relative to native B-DNA. However, cross-linking does confer a large degree of stabilization upon the duplexes, as reflected in increased melting temperatures of 15-21-degrees-C for the cross-linked oligonucleotides relative to those for the native sequences. In contrast, un-cross-linked tethers at the same adenines cause substantial decreases in the melting temperature. The cross-linked duplexes were also found to be stable to millimolar concentrations of beta-mercaptoethanol, an important feature for future applications of these cross-links to the study of protein-DNA interactions.
2-Cyanoethyl 2,2,2-Trichloroethyl Phosphorochloridate; An Effective Reagent for the Phosphorylation of Nucleosides
作者:K. Grześkowiak
DOI:10.1055/s-1980-29226
日期:——
WADA, TAKESHI;KATO, RYOHEI;HATA, TSUJIAKI, J. ORG. CHEM., 56,(1991) N, C. 1243-1250