A general method for N-glycosylation of nucleobases promoted by (p-Tol)<sub>2</sub>SO/Tf<sub>2</sub>O with thioglycoside as donor
作者:Guang-jian Liu、Xiao-tai Zhang、Guo-wen Xing
DOI:10.1039/c5cc03617h
日期:——
35 nucleosides were synthesized by coupling thioglycosides with pyrimidines and purines under the preactivation of (p-Tol)2SO/Tf2O in high yields and with β-stereoselectivities.
An Efficient Approach to the Synthesis of Nucleosides: Gold(I)-Catalyzed N-Glycosylation of Pyrimidines and Purines with Glycosyl ortho-Alkynyl Benzoates
Persuaded with gold: The title reaction in the presence of [Ph3PAuNTf2] (Tf=trifluoromethanesulfonyl) led conveniently to the corresponding nucleosides with excellent regioselectivity (see scheme). Even purine derivatives underwent this transformation owing to the mild conditions, which enabled the use of protecting groups that would not usually be compatible with N‐glycosylation conditions.
Synthesis of Nucleosides and Deoxynucleosides via Gold(I)-Catalyzed <i>N</i>-Glycosylation of Glycosyl (<i>Z</i>)-Ynenoates
作者:Rongkun Liu、Yan Chen、Jibin Zheng、Lvfeng Zhang、Tong Xu、Peng Xu、You Yang
DOI:10.1021/acs.orglett.2c03964
日期:2022.12.30
with purines was found to be very effective for regioselective synthesis of pyranosyl N9 purine nucleosides. Based on the catalytic N-glycosylation approach, convenient synthesis of two 5′-deoxynucleosides drugs (capecitabine and galocitabine), four 2′-deoxynucleoside drugs (floxuridine, trifluridine, decitabine and cladribine), four 3′,5′-dideoxynucleoside analogues, and four 2′,5′-dideoxynucleoside
NIS/TMSOTf-Promoted Glycosidation of Glycosyl <i>ortho</i>-Hexynylbenzoates for Versatile Synthesis of <i>O</i>-Glycosides and Nucleosides
作者:Rongkun Liu、Qingting Hua、Qixin Lou、Jiazhe Wang、Xiaona Li、Zhi Ma、You Yang
DOI:10.1021/acs.joc.1c00151
日期:2021.3.19
approach with glycosyl ortho-hexynylbenzoates as donors for the highly efficient synthesis of O-glycosides and nucleosides. The glycosidation approach highlights the merits of mild reaction conditions, cheap promoters, extremely wide substrate scope, and good to excellent yields. Notably, the glycosidation approach performs very well in the construction of a series of challenging O- and N-glycosidic