New type chiral calix[4](aza)crowns: synthesis and chiral recognition
β Scribed by Yongbing He; Yuanjing Xiao; Lingzhi Meng; Zhenya Zeng; Xiaojun Wu; Cheng-Tai Wu
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- French
- Weight
- 169 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0040-4039
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## Abstract Calix[4] (aza) crowns containing amide groups 3aβd were synthesized by the reactions of calix[4]arene (la) or __pβtertβ__butylcalix[4]arene (1b) with __N, Nβ²__βethylenebis(2βchloroacetamide) (2a) or __N, Nβ²β__ 1,2βethylenebis (2βchloroacetamide) (2b) by one step procedure in yields of 8
Abstraa: A new type of calix [4]crown containing ester group 3 has been synthesized and selectively nitrated to give 4 or ipso-nitrated to give 6. By nitration a novel calixcrown 5 containing a qninone segment was obtained. These nitrated calixcrowns have been used as chromogenic hosts for complexin