developed. The reaction proceeds smoothly under visible-light irradiation and features the using of cost-effective and easily handled catalysts and starting materials, which allows the highlystereoselectivesynthesis of diverse aryl/heteroaryl-C-nucleosides in moderate to high yields.
Biginelli cyclocondensation reaction of 3-hydroxybenzaldehyde, ethyl acetoacetate and thiourea afforded the corresponding dihydropyrimidine-2-thione, called monastrol, in 95% isolated yield. The chiral resolution of racemic monastrol, a mitosis blocker by kinesin Eg5 inhibition, was carried out on a preparative scale (ca. 100 mg) through diastereomeric N-3 ribofuranosyl amides.
Mild Approach to Nucleoside Analogues via Photoredox/Cu-Catalyzed Decarboxylative C–N Bond Formation. Total Synthesis of Oxetanocin A
作者:Ruonan Wang、Hao Xu、Arpan Banerjee、Zhongwen Cui、Yuyong Ma、William G. Whittingham、Peng Yang、Ang Li
DOI:10.1021/acs.orglett.3c00914
日期:2024.4.12
The conventional N-glycosylation methods for nucleosidesynthesis usually require strongly acidic or basic conditions. Here we report the decarboxylative C(sp3)–N coupling of glycosyl N-hydroxyphthalimide esters with nucleobases via dual photoredox/Cu catalysis, which offered a mild approach to nucleosideanalogues. A total synthesis of oxetanocin A, an antiviral natural product containing an oxetanose