Synthesis of novel C2-symmetric and enantiomerically pure bisbenzoxazoles and bisbenzothiazoles derived from L- and D-tartaric acids

被引:17
作者
Jiao, P
Xu, JX [1 ]
Zhang, QH
Choi, MCK
Chan, ASC
机构
[1] Peking Univ, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
[2] Hong Kong Polytech Univ, Open Lab Chirotechnol, Hong Kong, Hong Kong, Peoples R China
[3] Hong Kong Polytech Univ, Dept Appl Biol & Chem Technol, Hong Kong, Hong Kong, Peoples R China
基金
中国国家自然科学基金;
关键词
D O I
10.1016/S0957-4166(01)00547-X
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Five pairs of novel G-symmetric and enantiomerically pure bisbenzoxazoles and a pair of bisbenzothiazoles derived from L- and D-tartaric acids have been synthesized from L- and D-2,3-O-isopropylidenetartaric dichlorides and o-aminophenol derivatives or o-amino thio phenol, respectively, in two- or one-step reactions. The mechanism for the formation of bisbenzoxazoles and bisbenzothiazoles was suggested. The UV and H-1 NMR spectra showed that no coordination between the bisbenzoheterazoles and Cu(I) or Ni(II) cations occurred due to the lack of a sufficiently basic nitrogen donor atom in the benzoheterazole moiety. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:3081 / 3088
页数:8
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