Palladium(II)-Catalyzed Cross-Coupling of Diazo Compounds and Isocyanides to Access Ketenimines
作者:Zhaohong Liu、Shanshan Cao、Jiayi Wu、Giuseppe Zanoni、Paramasivam Sivaguru、Xihe Bi
DOI:10.1021/acscatal.0c02867
日期:2020.11.6
functionalities and valuable building blocks commonly utilized in organic synthesis. Their cross-coupling for the synthesis of useful isolable ketenimines remains an unsolved challenge in synthetic chemistry. Herein, we report a general method for the preparation of ketenimines via a palladium-catalyzed cross-coupling of easily accessible diazo compounds with isocyanides. The reaction benefits from the
Enantioselective Copper-Catalyzed O-H Insertion of α-Diazo Phosphonates
作者:Qi-Lin Zhou、Shou-Fei Zhu、Wang-Qiao Chen、Qian-Qian Zhang、Hong-Xiang Mao
DOI:10.1055/s-0030-1259710
日期:2011.4
A copper-catalyzed asymmetric O-H insertion of α-di-azophosphonates with alcohols by using chiral spiro bisoxazoline ligandswas developed. The insertion reaction exhibited good yields (upto 89%) with high enantioselectivities (up to 98% ee)and provided an efficient approach for synthesis of enantiomericallyenriched α-alkoxy and hydroxy phosphonate derivatives startingfrom readily available materials
Switchable Synthesis of 3-Substituted 1<i>H</i>-Indazoles and 3,3-Disubstituted 3<i>H</i>-Indazole-3-phosphonates Tuned by Phosphoryl Groups
作者:Guihua Chen、Minglin Hu、Yungui Peng
DOI:10.1021/acs.joc.7b02857
日期:2018.2.2
3-alkyl/aryl-3H-indazole-3-phosphonates were synthesized efficiently through a 1,3-dipolarcycloadditionreaction between α-substituted α-diazomethylphosphonates and arynes under simple reaction conditions. The product distribution was controlled by the phosphoryl group, which acted both as a tuning group and a traceless group in the reaction.
Enantioselective Intermolecular C–H Functionalization of Primary Benzylic C–H Bonds Using ((Aryl)(diazo)methyl)phosphonates
作者:Yasir Naeem、Bianca T. Matsuo、Huw M. L. Davies
DOI:10.1021/acscatal.3c04661
日期:2024.1.5
site-selective (>30:1 r.r.) benzylicC–Hfunctionalization. The phosphonate group is much more sterically demanding than the previously studied carboxylate ester group, leading to much higher selectivity for a primary site versus more sterically crowded positions. The effectiveness of this methodology has been demonstrated by the late-stage primary C–Hfunctionalization of estrone, adapalene, (S)-naproxen
Enantioselective copper-catalyzed B–H bond insertion reaction of α-diazo phosphonates to access chiral α-boryl phosphonates
作者:Longlong Li、Kui Yu、Hejun An、Xinping Cai、Qiuling Song
DOI:10.1039/d4sc01271b
日期:——
materials science. Despite the abundance of reported highly enantioselective methods for synthesizing various chiral phosphorus compounds, the enantioselective synthesis of α-boryl phosphorus compounds still remains an unknown territory. Here, we report a method for the construction of chiral α-boryl phosphates by asymmetric B–H insertion reaction using α-diazo phosphates as carbene precursors, cheap and