Intermolecular Hydrogen Abstraction Reaction between Nitrogen Radicals in Purine Rings and Alkyl Ethers: A Highly Selective Method for the Synthesis of N-9 Alkylated Purine Nucleoside Derivatives
A highly selective method for the synthesis of N‐9 alkylated purine nucleoside derivatives via an intermolecular hydrogen abstraction reaction between nitrogen radicals in purine rings and alkyl ethers was developed. Novel purine nucleoside derivatives were obtained with good to high yields in the presence of (diacetoxyiodo)benzene (DIB) and iodine in one‐step reaction.
N -9 Alkylation of purines via light-promoted and metal-free radical relay
作者:Runze Mao、Lifeng Sun、Yong-Shi Wang、Min-Min Zhou、De-Cai Xiong、Qin Li、Xin-Shan Ye
DOI:10.1016/j.cclet.2017.08.005
日期:2018.1
approach to the synthesis of N -9 alkylated purine nucleoside derivatives, via a CF 3 radical triggered radical relay pathway, has been developed. Purine nucleoside derivatives were prepared regioselectively in good to high yields. Photosensitizers and metals are free in this transformation. Visible light or even sunlight can be used as the source of light for the reactions.
Copper-catalyzed N-alkoxyalkylation of nucleobases involving direct functionalization of sp3 C–H bonds adjacent to oxygen atoms
作者:Rui Huang、Chunsong Xie、Lin Huang、Jinhua Liu
DOI:10.1016/j.tet.2012.11.020
日期:2013.1
N-Alkoxyalkylation of nucleobases was realized by the copper-catalyzed peroxide-promoted coupling of nucleobases with readily available saturated ethers. Both purines and pyrimidines could be N-alkoxyalkylated through this method in moderate to good yields. 2D-NMR revealed that N9-alkoxyalkylation preferentially occurred when purines were used in this reaction.
l-ProT catalyzed highly regioselective N-alkoxyalkylation of purine rings with vinyl ethers
作者:Jian-Jun Li、Xing-Xing Gui
DOI:10.1016/j.cclet.2014.04.023
日期:2014.10
An efficient and regioselective synthesis of N-9 alkoxyalkylated purine nucleoside derivatives was achieved via the N-alkoxyalkylation of purine rings with vinyl ethers catalyzed by L-ProT. The advantages of this protocol include good to excellent yield, mild reaction condition, and simple manipulation. A plausible mechanism for the transformation was given. (C) 2014 Jian-Jun Li. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.