Oligoamide strands 1, 2, and 3, consisting of 4-H-bond units, were originally designed to form noncovalent polymers based on the expectation that they would adopt an extended conformation. Instead of assembling into the expected supramolecular polymer through their 4-H-bond units, the 1:1 mixture of 1 and 2 was found to form a highly stable dimeric species. To dimerize, the H-bonding sequences of 1 and 2 can only adopt a folded (stacked) conformation. The self-assembly of 3 was also found to adopt a similar folded duplex conformation. These novel duplex foldamers are very stable. They were characterized by 1D and 2D 1H NMR, VPO, and mass spectral (ESI) studies.
The chemotherapy of schistosomiasis. Part VIII. 2-Carboxy- and 2-carbamoyl-4-aminophenyl ethers
作者:R. F. Collins、M. Davis
DOI:10.1039/j39660002196
日期:——
Synthetic work in the series of schistosomicidal p-aminophenyl ethers has been continued with the introduction of carboxy-, carbamoyl-, alkylsulphonyl-, and some miscellaneous nuclear substituents for structure–activity studies.
作者:Xiaowu Yang、Suzana Martinovic、Richard D. Smith、Bing Gong
DOI:10.1021/ja0361897
日期:2003.8.1
Oligoamide strands 1, 2, and 3, consisting of 4-H-bond units, were originally designed to form noncovalent polymers based on the expectation that they would adopt an extended conformation. Instead of assembling into the expected supramolecular polymer through their 4-H-bond units, the 1:1 mixture of 1 and 2 was found to form a highly stable dimeric species. To dimerize, the H-bonding sequences of 1 and 2 can only adopt a folded (stacked) conformation. The self-assembly of 3 was also found to adopt a similar folded duplex conformation. These novel duplex foldamers are very stable. They were characterized by 1D and 2D 1H NMR, VPO, and mass spectral (ESI) studies.