A Highly Diastereo- and Enantioselective Hg(II)-Catalyzed Cyclopropanation of Diazooxindoles and Alkenes
作者:Zhong-Yan Cao、Feng Zhou、Yi-Hua Yu、Jian Zhou
DOI:10.1021/ol302998m
日期:2013.1.4
It is reported for the first time that Hg(II) can catalyze the cyclopropanation of diazo reagents and alkenes, which contributes to the unprecedented highlydiastereo- and enantioselective synthesis of spirocyclopropyloxindoles.
Rhodium(II) catalyzed highly diastereoselective synthesis of conformationally restricted dispiro[1,3-dioxolane]bisoxindoles
作者:Sengodagounder Muthusamy、Rajagopal Ramkumar
DOI:10.1016/j.tet.2014.06.085
日期:2014.9
Synthesis of conformationally restricted dispiro- and bis-dispiro-1,3-dioxolanes via three-component reaction of diazoamides, ketoamides/diketones, and aromatic/heteroaromatic aldehydes in the presence of rhodium(II) acetate dimer catalyst at room temperature involving carbonyl ylides is demonstrated with diastereoselectivity. Synthesis of macrocyclic dispiro-1,3-dioxolanes via intramolecular carbonyl
Photochemical O−H Functionalization Reactions of Cyclic Diazoamides
作者:Claire Empel、Dennis Verspeek、Sripati Jana、Rene M. Koenigs
DOI:10.1002/adsc.202000818
日期:2020.11.4
Herein, we describe the photochemical O−H functionalization reaction of acidic alcohols with cyclic diazoamides. We studied the O−H functionalization reaction of different fluorinated and non‐fluorinated alcohols to give the corresponding ether products in high yields (43 examples, up to 97% yield). Furthermore, we performed studies to evaluate a photoexcited proton transfer reaction pathway in comparison
Construction of 2-alkynyl aza-spiro[4,5]indole scaffolds <i>via</i> sequential C–H activations for modular click chemistry libraries
作者:Jun Zhang、Mengmeng Wang、Huiying Wang、Hui Xu、Junjie Chen、Ziqiong Guo、Biao Ma、Shu-Rong Ban、Hui-Xiong Dai
DOI:10.1039/d1cc02798k
日期:——
one-pot, three-step synthesis demonstrated the utility of this protocol. Hybrid conjugates with an oseltamivir derivative further offered a powerful tool for the construction of a versatile spiroindole-containing library via click chemistry.
Reaction of cyclic diazoamides with furan systems using rhodium(II) acetate as a catalyst afforded a variety of (3Z)-3-[(2E)-4-oxopent-2-en-1-ylidene]indol-2-ones in a regio- and diastereo-selective manner. The diastereoselectivity was based on the flow rate of cyclic diazoamides. The representative products were characterized by single-crystal X-ray analyses.