Efficient atom economic approaches towards macrocyclic crownamides via ring closure metathesis
摘要:
RCM of suitable 1,omega-dienes led to efficient atom economic synthetic approaches towards azacrown ether derivatives with eight- to twenty four-membered ring sizes. (C) 2002 Elsevier Science Ltd. All rights reserved.
Intramolecular Aminoazidation of Unactivated Terminal Alkenes by Palladium-Catalyzed Reactions with Hydrogen Peroxide as the Oxidant
作者:Francesca Foschi、Camilla Loro、Roberto Sala、Julie Oble、Leonardo Lo Presti、Egle M. Beccalli、Giovanni Poli、Gianluigi Broggini
DOI:10.1021/acs.orglett.0c00010
日期:2020.2.21
The palladium-catalyzed aminoazidation of aminoalkenes yielding azidomethyl-substituted nitrogen-containing heterocycles was developed. The procedure requires oxidative conditions and occurs at room temperature in the presence of hydrogen peroxide and NaN3 as the azide source. These conditions provide selective exo-cyclization/azidation of the carbon-carbon double bond, furnishing a versatile approach
An epoxide-opening cyclization/double Smiles rearrangement cascade approach to <i>N</i>-aryl-1,4-benzoxazines and <i>N</i>-arylindolines
作者:Jonali Das、Abhijit Gogoi、Biraj Jyoti Borah、Sajal Kumar Das
DOI:10.1039/d3ob00440f
日期:——
Reported herein is a transition-metal-free protocol for a regio- and diastereoselective synthesis of hydroxyalkyl group-embedded N-arylbenzo[b][1,4]oxazines and N-arylindolines based on an epoxide-opening cyclization/double Smiles rearrangement cascade of p-nosylamide-tethered epoxides. To the best of our knowledge, this is the first report of the integration of epoxide-opening cyclization with Smiles
Bosma; Meerburg; Verkade, Recueil des Travaux Chimiques des Pays-Bas, 1948, vol. 67, p. 235,238,239
作者:Bosma、Meerburg、Verkade
DOI:——
日期:——
Goldenberg; Van Meerbeeck; Wandestrick, European Journal of Medicinal Chemistry, 1980, vol. 15, # 6, p. 545 - 550
作者:Goldenberg、Van Meerbeeck、Wandestrick、et al.
DOI:——
日期:——
A new efficient method for the synthesis of 3,4-dihydro-2H-1,4-benzoxazines via iodocyclization
作者:K.C. Majumdar、Krishanu Ray、Sudipta Ponra
DOI:10.1016/j.tetlet.2010.08.016
日期:2010.10
An efficient approach for the synthesis of 3,4-dihydro-2H-1,4-benzoxazine derivatives is described by molecular iodine- mediated cyclization. The reaction condition is very simple, offers easy isolation, and affords good to excellent yields of the products. (C) 2010 Elsevier Ltd. All Fights reserved.