Project supported by the National Natural Science Foundation of China (Nos. 20621062, 20672137, 20732007, 20872167), the National Basic Research Program (No. 2007CB808001) and Chinese Academy of Sciences.
In a preliminary letter (Tetrahedron Lett. 2010, 51, 188), we reported two new hydrazide-based quadruple hydrogen-bonding motifs, this is, two monopodal (la and lb) and five dipodal (2a, 2b and 3a--3c) aromatic ...
National Natural Science Foundation of China (No.20921091,20732007,20974118,20872167);Ministry of Science and Technology of China (No.2007CB-808001);Science and Technology Commission of Shanghai Municipality (No.09XD1405300)for financial support
supported by the National Natural Science Foundation of China (20732007,20621062,20672137,20872167);the National Basic Research Program of China (2007CB808001);the Science and Technology Commission of Shanghai Municipality (09XD14-05300)
Three arylamide-bridged biscoumarin derivatives 1-3 have been designed and prepared. Compounds 1 and 2 are induced by the intramolecular N?H…O and N·H…F hydrogen bonding to possess a helical conformation,and 3 is i...
Supported by the National Natural Science Foundation of China(Grant Nos. 20732007, 20621062, 20872167, and 20672137);the National Basic Research Project (Grant No. 2007CB808000);the Chinese Academy of Sciences (Grant No. KJCX2-YW-H13)
Two aromatic hydrazide haptamers have been prepared,with both consisting of two hydrogen bonded folded segments. Compared to their fully hydrogen bonded analogues,the flexibility of their backbones increases due to la...