Polyazapolycyclics by condensation of aldehydes with amines. 2. Formation of 2,4,6,8,10,12-hexabenzyl-2,4,6,8,10,12-hexaazatetracyclo[5.5.0.05.9.03,11]dodecanes from glyoxal and benzylamines
Studies of the synthesis, protonation and decomposition of 2,4,6,8,10,12-hexabenzyl-2,4,6,8,10,12-hexaazatetracyclo[5.5.0.05,9.03,11]dodecane (HBIW)
作者:Michael R. Crampton、Javed Hamid、Ross Millar、George Ferguson
DOI:10.1039/p29930000923
日期:——
Reaction of glyoxal with benzylamine or with substituted benzylamines leads to the cage structure 3. The X-ray crystal structure of 3c formed from 4-chlorobenzylamine is reported. H-1 and C-13 NMR spectra of 3a-j have been measured. Changes in spectra in the presence of acid indicate successive reaction to give mono- and di-protonated species, 4 and 5 respectively, in which the added protons bridge two nitrogen atoms. The kinetics of the decomposition of 3a in aqueous acetonitrile are compatible with two competing pathways involving reaction of the protonated form with either water or more acid.
Cage amines as the stopper inhibitors of cholinesterases
作者:Gialih Lin、Hou-Jen Tsai、Yi-Hon Tsai
DOI:10.1016/s0960-894x(03)00599-7
日期:2003.9
Cage amines 1-4 are potent peripheral anionic site-bound reversible inhibitors of both acetylcholinesterase and butyrylcholinesterase. Cage amines 1-3 are selective butyrylcholinesterase inhibitor versus acetylcholinesterase. For both enzymes, the -log K-i values linearly correlate with the difference of substituted phenyl radius of cage amines (-log K-i = 5.4 + 3.4Deltagamma for acetylcholinesterase, -log K-i = 5.9 + 3.2Deltagamma for butyrylcholinesterase). Moreover, the relationship between the enzymes and cage amines mimics that between bottles and stoppers. (C) 2003 Elsevier Ltd. All rights reserved.
Green Synthesis of 1,3-Dibenzylimidazolidine-2,4,5-triones by Oxidation of Hexabenzylhexaazaisowurtzitanes
Herein, a novel and convenient procedure is described for the preparation of 1,3‐dibenzylimidazolidine‐2,4,5‐triones. This method is based on a multi‐stage oxidation of hexabenzylhexaazaisowurtzitanes by hydrogen peroxide in acetic acid, leading to the title compounds in relatively good yields.
Polyazapolycyclics by condensation of aldehydes with amines. 2. Formation of 2,4,6,8,10,12-hexabenzyl-2,4,6,8,10,12-hexaazatetracyclo[5.5.0.05.9.03,11]dodecanes from glyoxal and benzylamines
作者:Arnold T. Nielsen、Robin A. Nissan、David J. Vanderah、Clifford L. Coon、Richard D. Gilardi、Clifford F. George、Judith Flippen-Anderson