(Diacetoxyiodo)benzene-Mediated Transition-Metal-Free Amination of C(sp3)–H Bonds Adjacent to Heteroatoms with Azoles: Synthesis of N-Alkylated Azoles
作者:Can Jin、Weike Su、Bin Sun、Zhiyang Yan
DOI:10.1055/s-0037-1610293
日期:2018.11
cross-dehydrogenative coupling reaction of α-C(sp3)–H bonds adjacent to a hetero atom with various azoles has been developed, which provides an alternative method for constructing C–N bonds with high atom efficiency. This new protocol requires no metal catalyst and it provides ready access to a wide range of N-alkylated azole derivatives in moderate to excellent yields by using commercially available PhI(OAc)2
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.
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.