Multiturn Hollow Helices: Synthesis and Folding of Long Aromatic Oligoamides
Aromatic oligoamides adopting helical conformations are synthesized by coupling carboxyl-terminated basic units having two, four, and eight residues to amine-terminated oligomer precursors. Coupling yields show no noticeable reduction with the size of the
Four porphyrin-bridge-C60 dyads have been synthesized by covalently linking the chromophores at the opposite ends of a hydrogen bonded arylamide-derived foldamer bridge. For comparison, four C60-free porphyrin derivatives of the same frameworks have also been prepared. The fully hydrogen bonded bridges enable the appended porphyrin and C60 moieties to contact in a face-to-face manner. 1H NMR, UV-vis and fluorescent investigations in chloroform indicate that such a structural matching remarkably facilitates the intramolecular energy and electron transfer and charge separation between the two chromophores and also retards the recombination of the charge-separated state. Removing one hydrogen bond considerably reduces the energy and electron transfer. Further removing another one leads to no important interaction between the chromophores to occur.
Aromatic oligoamide macrocycles from the bimolecular coupling of folded oligomeric precursors
Aromatic oligoamide macrocycles consisting of six to ten meta-linked residues were prepared based on bimolecular coupling/cyclization of a pentameric diamine and oligomeric diacid chlorides, and adopt folded conformations enforced by intramolecular three-
Improving foldamer synthesis through protecting group induced unfolding of aromatic oligoamides
(Chemical Equation Presented) The hydrogen bond rigidified backbones of aromatic oligoamides are temporarily interrupted by replacing the amide hydrogens with the acid-labile 2,4-dimethoxybenzyl (DMB) group, which allows the efficient preparation of long
Zhang, Aimin,Ferguson, Joseph S.,Yamato, Kazuhiro,Zheng, Chong,Gong, Bing
p. 5117 - 5120
(2007/10/03)
N-(3-pyrrolidinyl) benzamide derivative
N-(3-Pyrrodinyl)benzamide derivatives represented by the following general formula (I) which have potent and selective antagonism against dopamine D3 and/or D4 receptor and are useful as a psychotropic, a schizophrenia-treating agent and the like, or a pharmaceutically acceptable salt thereof or a pharmaceutical preparation thereof. STR1
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(2008/06/13)
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