A Combined Experimental and Density Functional Theory Study on the Pd-Mediated Cycloisomerization of o-Alkynylnitrobenzenes - Synthesis of Isatogens and Their Evaluation as Modulators of ROS-Mediated Cell Death
作者:Chepuri V. Ramana、Pitambar Patel、Kumar Vanka、Benchun Miao、Alexei Degterev
DOI:10.1002/ejoc.201000769
日期:2010.11
nitro–alkyne cycloisomerization leading to isatogens. Since the first documentation of this reaction by Baeyer (picture of Baeyer and the corresponding literature citation are shown) in the late 19th century, a mild and general method for the synthesis of isatogens has been sought. The electrophilic PdII halide complexes are found to bring about this cyclization to provide the desired isatogens and accommodate
One-Pot Au[III]-/Lewis Acid Catalyzed Cycloisomerization of Nitroalkynes and [3 + 3]Cycloaddition with Donor–Acceptor Cyclopropanes
作者:Pawan S. Dhote、Chepuri V. Ramana
DOI:10.1021/acs.orglett.9b02035
日期:2019.8.16
tricyclic pseudoindoxyl scaffold from 2-nitroalkynylbenzenes, comprising of an Au(III)-catalyzed nitroalkyne cycloisomerization leading to isatogen and its [3 + 3]-cycloaddition with donor–acceptorcyclopropanes mediated by a suitable Lewisacid, has been developed.
executed by employing three catalytic transformations in sequence. The key reactions that have been developed in this context include the [Au]-catalyzed addition of protected tryptamine to isatogens and the reduction of N-OH to NH with hydrazine monohydrate.