The 1H, 13C, and 15N NMRspectra of 5 exocyclic alkenes and 15 different ketimines obtained from cyclohexanone and derivatives using benzyl bromide and primary amines—are analyzed. Relative stereochemical and preferential conformations are determined by analyzing both the homonuclear coupling and the chemical shifts of the protons and carbon atoms in the aliphatic rings, which are directly related
Structural and conformational analysis of 1-oxaspiro[2.5]octane and 1-oxa-2-azaspiro[2.5]octane derivatives by 1H, 13C, and 15N NMR
作者:Rubén Montalvo-González、Armando Ariza-Castolo
DOI:10.1002/mrc.3792
日期:2012.1
A structural and conformational analysis of 1-oxaspiro[2.5]octane and 1-oxa-2-azaspiro[2.5]octane derivatives was performed using (1) H, (13) C, and (15) N NMR spectroscopy. The relative configuration and preferred conformations were determined by analyzing the homonuclear coupling constants and chemical shifts of the protons and carbon atoms in the aliphatic rings. These parameters directly reflected
Reductive Amination of Aldehydes and Ketones with Sodium Borohydride Supported Onto HZSM-5 Zeolite Under Microwave Irradiation in a Solvent Free System
作者:Hossein A. Oskooie、Somaih Solemani Amiri、Majid M. Heravi、Mitra Ghassemzadeh
DOI:10.1080/104265090902831
日期:2005.9.1
Sodium borohydride supported onto a HZSM-5 zeolite is presented as a general reducing agent for the reductive amination of aldehydes and ketonesundermicrowaveirradiation in solventless system.