Organic-inorganic copolymers with double-decker silsesquioxane in the main chains by polymerization via click chemistry
作者:Kun Wei、Lei Wang、Sixun Zheng
DOI:10.1002/pola.26836
日期:2013.10
A series of novel organic–inorganiccopolymers with polyhedral oligomeric silsesquioxane (POSS) in the mainchains were synthesized via the copper‐catalyzed Huisgen 1,3‐dipolar cycloaddition polymerization approach. Toward this end, we synthesized 3,13‐azidopropyloctaphenyl double‐decked silsesquioxane (DDSQ). This difunctional POSS macromer was used to copolymerize with α,ω‐dialkynyl‐terminated oligoethylenes
Adaptable synthesis of C-lactosyl glycoclusters and their binding properties with galectin-3
作者:Wang Yao、Meng-jie Xia、Xiang-bao Meng、Qing Li、Zhong-jun Li
DOI:10.1039/c4ob01374c
日期:——
The synthesis of mono- to tetravalent C-β-lactosyl glycoclusters has been achieved in good yield. The KD values of glycoclusters against galectin-3 were tested by SPR assay, and the structure–activity relationship has been summarized in detail.
complex give [7]–[21]polyether cyclophanes in good yield. [8]–[9]Ester cyclophanes were also synthesized from the corresponding α,ω-diynes. The ratio of para-, meta-, and orthocyclophanes depends on the length and the structure of the α,ω-diyne tether chain, whilst the effect of concentration on the yield of polyether cyclophanes appears to be small. X-ray analysis revealed that a single crystal of [15]metacyclophane
The first enantioselective synthesis of planar chiral [7] and [8]paracyclophanes has been achieved by the cationic rhodium(1)―(S)-H 8 -BINAP complex catalyzed [2+2+2] cycloaddition. Planar chiral [9]paracyclophanes were also synthesized by the same method. The first X-ray crystallographic analysis of the strained dioxa[7]paracyclophane revealed the significant deformation of the benzene ring from planarity
Enantioselective synthesis of planar-chiral metacyclophanes through cationic Rh(I)/modified-BINAP-catalyzed inter- and intramolecular alkyne cyclotrimerizations
We have achieved the first catalytic enantioselective synthesis of planar-chiral metacyclophanes by means of cationic Rh(I)/(S)-xyl-H-8-BINAP or (R)-H-8-BINAP complex-catalyzed inter- and intramolecular alkyne cyclotrimerizations. This highly enantioselective catalysis represents a versatile new method for the preparation of planar-chiral metacyclophanes. (c) 2007 Elsevier Ltd. All rights reserved.