The Preparation of Crown Ethers Containing Dicinnamoyl Groups and Their Complexing Abilities
作者:Sadatoshi Akabori、Shigemi Tsuchiya
DOI:10.1246/bcsj.63.1623
日期:1990.6
the crown ethers, 10a, 10b and 10c, by Pyrex-filtered UV light (>300 nm) gave the corresponding intramolecular [2+2]photocycloadducts, 11a, 11b and 11c, in 95.8, 93.2 and 90.1% yields, respectively. The structures of 11a, 11b and 11c were confirmed to be the β-form by their 1H NMR spectra. The photoreversible cleavage of 11a, 11b and 11c by 220 nm UV light gave the corresponding starting crown ethers
1, 10-双[对-[2-(氯甲酰基)乙烯基]苯基]-1,4,7,10-四氧癸烷与邻苯二酚的二钾盐在催化量的18-crown-6存在下反应在苯中得到 5,6-苯并-4,7,17,20,23,29-hexaoxa[10.10]paracyclopha-1,5,9-triene-3,8-dione (10a),产率为 3.6%。此外,24,25-benzo-1,4,7,10,13,23,26-heptaoxa[13.10]paracyclopha-20,24,28-triene-22,27-dione (10b) 和 27,28-benzo -1,4,7,10,13,16,26,29-octaoxa[16.10]paracyclopha-23,27,31-triene-25,30-dione (10c) 用同样的方法以3.1和3.0%得到产量,分别。在 95.8、93.2 和 95.8、93