cyclohexane‐derived hydrazides, their monomers can self‐assemble to form gels throughintermolecularhydrogenbonds and dipole‐dipole interactions. Significantly, conjugated phthalhydrazide can self‐aggregate into planar and circular trimers throughintermolecularhydrogenbonds and then self‐assemble to form gels throughintermolecular π–π stacking interactions. It is interesting that these simple gelators
Synthesis of Dimethyl 1,2-Cycloalkanedicarboxylates by Electrochemical Cyclization of Dimethyl α,α′-Dibromoalkanedioates Using a Copper Anode
作者:Masao Tokuda、Atsushi Hayashi、Hiroshi Suginome
DOI:10.1246/bcsj.64.2590
日期:1991.8
The electrochemical cyclization of dimethyl α,α′-dibromoalkanedioates by making use of a platinum cathode and a copper anode in the presence of sodium iodide gave three- to six-membered dimethyl 1,2-cycloalkanedicarboxylates in good yields.
Enantiomericallypure trans-2-aminocyclohexanecarboxylic acid is an important building block for helical β-peptides. We report here that this amino acid can be obtained from trans-cyclohexane-1,2-dicarboxylic acid in good yield by a simple one-pot procedure comprising cyclization to the anhydride, amide formation with ammonia, and a subsequent Hofmann-type degradation with phenyliodine(III) bis(trifluoroacetate)
The Construction of Homochiral Lanthanide Quadruple-Stranded Helicates with Multiresponsive Sensing Properties toward Fluoride Anions
作者:Wanmin Chen、Xiaoliang Tang、Wei Dou、Bei Wang、Lirong Guo、Zhenghua Ju、Weisheng Liu
DOI:10.1002/chem.201700827
日期:2017.7.21
series of unique homochiral lanthanide tetranuclear quadruple‐stranded helicates have been self‐assembled controllably by using the intrinsic advantages of chiral bridging ligands, (S)‐H2L and (R)‐H2L, and lanthanide ions with high coordination numbers. The self‐assembly process of these chiral helicates not only ensures the structural stability and quadruple‐stranded feature of lanthanide cluster in
Opticallyactive ditopic halogen bond donors bearing two 4-iodotetrafluorophenyl groups were obtained by reaction of chiral diols with iodopentafluorobenzene. Co-crystallization of these donors with anti-4,4′-azopyridine afforded binary complexes containing infinite chains of the alternating component molecules connected by halogen bonds. The solid state CD measurements confirmed that complexation