作者:Yin Chen、De-Xian Wang、Zhi-Tang Huang、Mei-Xiang Wang
DOI:10.1039/c1cc12075a
日期:——
A novel type of ditopic ion pair receptors based on anionâÏ interaction is reported. Oxacalix[2]arene[2]triazine azacrowns were synthesized efficiently from a one-pot reaction between 2,4-dichloro-4-methoxytriazine and 3,5-dihydroxybenzaldehyde followed by condensation with a diamine and reduction of bisimine; they acted as selective ditopic receptors to recognize ion pairs.
Novel synthesis of 1,4-diazacrown ethers by reductive coupling of aromatic diimines
作者:Tatsuya Shono、Naoki Kise、Eiichi Okazaki
DOI:10.1016/s0040-4039(00)92085-9
日期:1992.6
The electroreduction or chemical reduction with zinc powder has been found to be effective to intramolecular coupling of aromatic diimines yielding 1,4-diazacrown ethers. The latter reduction was particularly effective to formation of 1,4-diaza-12-crown-4 derivatives due to the template effect of Zn2+.
Kamalov, G. L.; Zakolodyashnaya, O. V.; Manolova, A. V., Journal of general chemistry of the USSR, 1992, vol. 62, # 6.2, p. 1147 - 1153
作者:Kamalov, G. L.、Zakolodyashnaya, O. V.、Manolova, A. V.、Lozitskaya, R. N.、Gavsevich, Yu. V.
作者:Yehia A. Ibrahim、Talal F. Al-Azemi、Mohamed D. Abd El-Halim
DOI:10.1021/jo100679d
日期:2010.7.2
An efficient approach to highly rigid macrocyclic bisazetidinones with interesting structural feature was achieved via sequential Staudinger ketene-imine cycloaddition of o-allyloxyphenoxyketene and bis-arylidenediamines followed by RCM. The ketene-imine cycloaddition afforded the corresponding bis-o-allyloxyphenoxyazetidinones as the cis-cis diastereomers, exclusively obtained as a mixture of cis-syn-cis and cis-anti-cis. RCM of the latter using Grubbs' catalysts afforded good yields of the corresponding novel macrocyclic bisazetidinones. The cis-anti-cis bisazetidinones are readily identified by (1)H NMR using Eu(hfc)(3) chiral shift reagent. (1)H NMR indicated the high shielding effect of the aryl substituents on one of the ortho-H's of the condensed phenylene ring, and VT (1)H NMR indicates the highly restricted rotation of the aryl groups, thus offering a highly rigid system.
Bogat-skii, A.V.; Luk'yanenko, N.G.; Shapkin, V.A., Journal of Organic Chemistry USSR (English Translation), 1984, vol. 20, p. 798 - 804