Chitosan–silica sulfate nanohybrid: a highly efficient and green heterogeneous nanocatalyst for the regioselective synthesis of N-alkyl purine, pyrimidine and related N-heterocycles via presilylated method
pyrimidine nucleobases as well as other related N-heterocycles with HMDS utilizing chitosan–silica sulfate nanohybrid (CSSNH) is described. CSSNH is proved to be a useful, highly efficient and eco-friendly heterogeneous nanohybrid catalyst for silylation of nucleobases. The presilylated nucleobases then underwent the reaction with different sources of carbon electrophiles to afford the desired N-alkyl-substituted
Purine acyclic nucleosides. Nitrogen isosteres of 9-[(2-hydroxyethoxy)methyl] guanine as candidate antivirals
作者:James L. Kelley、Mark P. Krochmal、Howard J. Schaeffer
DOI:10.1021/jm00144a033
日期:1981.12
A number of nitrogen analogues of 9-[(2-hydroxyethoxy)methyl]guanine [acylovir, Zovirax] containing amine functions in the side chain were synthesized and tested for antiviral activity. These purineacyclicnucleosides were prepared by reaction of tris(trimethylsilyl)guanine or 2,6-diaminopurine sodium salt with the chloromethyl ethers prepared from N-(2-hydroxyethyl)phthalimide, N-[2-(2-hydroxyet
Synthesis and antiherpetic activity of (S)-, (R)-, and (.+-.)-9-[(2,3-dihydroxy-1-propoxy)methyl]guanine, linear isomers of 2'-nor-2'-deoxyguanosine
作者:Wallace T. Ashton、Laura F. Canning、Glenn F. Reynolds、Richard L. Tolman、John D. Karkas、Richard Liou、Mary Ellen M. Davies、Corrille M. DeWitt、Helen C. Perry、A. Kirk Field
DOI:10.1021/jm00145a014
日期:1985.7
Racemic 9-[(2,3-dihydroxy-1-propoxy)methyl]guanine [(+/-)-iNDG], a new analogue of acyclovir (ACV) and a structural analogue of 2'-nor-2'-deoxyguanosine (2'NDG), was synthesized and found to inhibit the replication of herpes simplex virus types 1 (HSV-1) and 2 (HSV-2). Subsequently, its optical isomers, (R)- and (S)-iNDG, were prepared from chiral intermediates. The chloromethyl ethers of 1,2-di-O-benzyl-D-
Enzymatic phosphorylation of the antiherpetic agent 9-[(2,3-dihydroxy-1-propoxy)methyl]guanine
作者:J. D. Karkas、W. T. Ashton、L. F. Canning、R. Liou、J. Germershausen、R. Bostedor、B. Arison、A. K. Field、R. L. Tolman
DOI:10.1021/jm00155a039
日期:1986.5
nine (iNDG) is phosphorylated by HSV1 thymidine kinase, and its phosphorylated products inhibit DNA polymerase activity. iNDG exists in two enantiomeric forms, each with a primary and a secondary hydroxyl; thus, a number of possibilities for preferentialphosphorylation exist, which were explored in this study. HSV1 thymidine kinase phosphorylates the primary hydroxyl of both the R and the S isomers