Stereoselective Synthesis of 1-Tuberculosinyl Adenosine; a Virulence Factor of <i>Mycobacterium tuberculosis</i>
作者:Jeffrey Buter、Dorus Heijnen、Ieng Chim Wan、F. Matthias Bickelhaupt、David C. Young、Edwin Otten、D. Branch Moody、Adriaan J. Minnaard
DOI:10.1021/acs.joc.6b01332
日期:2016.8.5
challenging. Here, a multigram-scale stereoselectivesynthesis of 1-TbAd and N6-TbAd is described. As a key-step, a chiral auxiliary-mediated Diels–Alder cycloaddition was developed, introducing the three stereocenters with a high exo endo ratio (10:1) and excellent enantioselectivity (>98% ee). This constitutes the first entry into the stereoselectivesynthesis of diterpenes with the halimane skeleton
Chemical synthesis of 13C labeled anti-HIV nucleosides as mass-internal standards
作者:Yoshio Saito、Thomas A Zevaco、Luigi A Agrofoglio
DOI:10.1016/s0040-4020(02)01246-2
日期:2002.11
Synthesis of [13C5]-labeled anti-HIV nucleosides, e.g. d4T, ddI, ddA, is described. The methodology used has been optimized due to the very high cost of the starting compound. The key step of this approach was the stereoselective dehomologation of 1,2:5,6-di-O-isopropylidene-3-oxo-α-d-glucofuranose (2) with periodic acid and sodium borohydride, which gave optically pure ribose derivative as the exclusive
5′-O-dimethoxytrityl protected DNA-phosphoramidites and 5′-O-dimethoxytrityl-2′-O-trialkylsilyl protected RNA-phosphor-amidites for the solid phase synthesis of DNA- and RNA-oligomers and to 5′-O-ribo- and deoxyribo-nucleosidetriphosphates for template controlled enzymaticsynthesis (polymerase- or reverse transcriptase reaction) has been carried out.
Synthesis of <sup>13</sup>
C-labeled 5-aminoimidazole-4-carboxamide-1-β-D-[<sup>13</sup>
C<sub>5</sub>
] ribofuranosyl 5′-monophosphate
作者:Allison K. Zarkin、Phyllis D. Elkins、Amanda Gilbert、Teresa L. Jester、Herbert H. Seltzman
DOI:10.1002/jlcr.3647
日期:2018.9
enzymatic, and chemical synthesis approach that applies an enzymatic conversion from adenosine to inosine followed by a ring-cleavage of the protected inosine. A direct phosphorylation of the resulting 2',3'-isopropylidine acadesine (5) was developed to yield the title compound in 99% purity following ion exchange chromatography.