首页   按分类浏览 期刊浏览 卷期浏览 The Conformational Behaviour of 10‐Substituted Spiro[4.5]decanes
The Conformational Behaviour of 10‐Substituted Spiro[4.5]decanes

 

作者: J. Jens Wolff,   Gernot Frenking,   Klaus Harms,  

 

期刊: Chemische Berichte  （WILEY Available online 1991）
卷期: Volume 124, issue 3  

页码: 551-561

 

ISSN:0009-2940

 

年代: 1991

 

DOI:10.1002/cber.19911240322

 

出版商: WILEY‐VCH Verlag

 

关键词: Conformational analysis;Spiro[4.5]decanes;Allylboration, transition state models;Ketals, chiral, cleavage by Lewis acids;Calculations, MNDO and SYBYL

 

数据来源: WILEY

 

摘要:

AbstractThe conformational behaviour of 10‐X‐substituted 1,4‐dioxa‐and 1,4,6‐trioxaspiro[4.5]decanes1–4has been studied by13C‐,19F‐ and1H‐NMR spectroscopy. Two X‐ray analyses (of2a,e) are presented, and their implications to cleavage reactions of chiral acetals are discussed. Participation of twist boat forms in the conformeric equilibrium of at least1chas been made plausible by observing13C,19F‐NMR coupling constants. The ratios of axial to equatorial conformer in1–4have been calculated

 

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