157326-63-1Relevant academic research and scientific papers
Synthesis and molecular orbital calculations of some benzo-substituted macrocyclic diamides and their corresponding macrocyclic dithiodiamides
Mohamed, Adel A.,Masaret, Ghada S.,Elwahy, Ahmed H.M.
, p. 4000 - 4010 (2007)
A new series of benzo-substituted macrocyclic diamides were prepared by nucleophilic reaction of the appropriate dipotassium salts with the corresponding bis(halo) compounds in refluxing DMF. Treatment of the novel macrocyclic diamides with Lawesson's reagent in refluxing toluene led to the formation of the corresponding macrocyclic dithiodiamides in good yields. Molecular orbital calculations were performed at the semi-empirical level AM1 on some of the studied macrocycles. Thermodynamic functions show that the most stable structures in gas phase that have internal amine groups are less in energy than the other ones that have internal carbonyl groups. The solvent polarity does not appreciably affect the stability trend of the three conformers of each compound due to their comparable dipole moments. A complete and thorough survey of proton affinity (PA) and proton detachment energies (PDE) on each of the possible sites has been performed.
A Convenient Method for Preparing Some New Macrocyclic Diamides
Liu, Lilian Kao,Hsieh, Tsing-Pai,Kuo, Sung-Ming
, p. 309 - 312 (2007/10/02)
A simple and convenient method for preparing macrocyclic diamides containing two sulfur atoms or two to four oxygen atoms of various ring sizes was developed.This two-step procedure is simply composed of reacting salicylic acid or 2-mercaptobenzoic acid w
