A new hydrogen bonding motif based on 10-hydroxy-10,9-borazarophenanthrene

被引:26
作者
Harris, KDM [1 ]
Kariuki, BM [1 ]
Lambropoulos, C [1 ]
Philp, D [1 ]
Robinson, JMA [1 ]
机构
[1] UNIV BIRMINGHAM,SCH CHEM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
基金
英国工程与自然科学研究理事会;
关键词
D O I
10.1016/S0040-4020(97)00515-2
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
The rational design of a system which mimics the molecular recognition properties of carboxylic acids but displays markedly different reactivity is presented. 10-Hydroxy-10,9-borazarophenanthrene is predicted by both structural analogy with carboxylic acids and ab initio calculations to form cyclic hydrogen bonded homodimers and its crystal structure demonstrates that this expectation is fulfilled. In solution, however, the reactivity of 10-hydroxy-10,9-borazarophenanthrene is markedly different from that of carboxylic acids - reacting with itself under certain conditions by nucleophilic addition at boron followed by loss of water to form the corresponding anhydride. This reactivity is rationalised in terms of the electronic structure of the borazarophenanthrene system. (C) 1997 Elsevier Science Ltd.
引用
收藏
页码:8599 / 8612
页数:14
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