Intramolecular aminochalcogenation and diamination of alkenes employing N-iodosuccinimide
摘要:
A NIS-mediated intramolecular diamination and aminosulfuration of alkenes with N-alkyl or N-aryl thioureas is reported. A chiral cyclic thiourea was also synthesized by the methodology. The protocol is also proven to be efficient in the intramolecular diamination and/or aminooxygenation of alkenes with N-alkyl or N-aryl ureas and ones with N-carbamate sulfamides. The resulting bicyclic thiourea could be further transformed into bicyclic guanidine. (C) 2015 Elsevier Ltd. All rights reserved.
Oxidative Diamination of Alkenes with Ureas as Nitrogen Sources: Mechanistic Pathways in the Presence of a High Oxidation State Palladium Catalyst
作者:Kilian Muñiz、Claas H. Hövelmann、Jan Streuff
DOI:10.1021/ja075041a
日期:2008.1.1
identical mechanism where stereochemistry is concerned. It exemplifies the importance of cationic palladium(IV) intermediates prior to the final reductiveeliminationfrom palladium and proves that the nucelophile for this step stems from the immediate coordination sphere of the palladium(IV) precursor. These results have important implications for the general development of alkene 1,2-difunctionalization
An intramolecular diamination of acrylates is reported using sulfamates as nitrogen sources. This reaction proceeds under palladium(II) catalysis with copper bromide as oxidant and gives rise to anti-configured 2,3-diamino carboxylates as bicyclic sulfamate derivatives. An aminobrominated intermediate within the diamination reaction was isolated that allowed to clarify the reaction mechanism and to rationalize the observed preferential product stereochemistry.
Intramolecular aminochalcogenation and diamination of alkenes employing N-iodosuccinimide
作者:Jun Zhang、Xuejun Zhang、Weijie Wu、Gengtao Zhang、Sheng Xu、Min Shi
DOI:10.1016/j.tetlet.2015.01.154
日期:2015.3
A NIS-mediated intramolecular diamination and aminosulfuration of alkenes with N-alkyl or N-aryl thioureas is reported. A chiral cyclic thiourea was also synthesized by the methodology. The protocol is also proven to be efficient in the intramolecular diamination and/or aminooxygenation of alkenes with N-alkyl or N-aryl ureas and ones with N-carbamate sulfamides. The resulting bicyclic thiourea could be further transformed into bicyclic guanidine. (C) 2015 Elsevier Ltd. All rights reserved.
An Iodine-Catalyzed Hofmann-Löffler Reaction
作者:Claudio Martínez、Kilian Muñiz
DOI:10.1002/anie.201501122
日期:2015.7.6
and ecologically benign alternatives to transition metals, although their application as molecular catalysts in challenging CH oxidation reactions has remained elusive. An attractive iodine oxidation catalysis is now shown to promote the convenient conversion of carbon–hydrogenbonds into carbon–nitrogen bonds with unprecedented complete selectivity. The reaction proceeds by two interlocked catalytic