On the relative reactivity of the C C double bond and the [10] annulene moiety versus SO3
作者:
Hans J. A. Lambrechts,
Hans Cerfontain,
期刊:
Recueil des Travaux Chimiques des Pays‐Bas
(WILEY Available online 1981)
卷期:
Volume 100,
issue 7‐8
页码: 291-292
ISSN:0165-0513
年代: 1981
DOI:10.1002/recl.19811000710
出版商: WILEY‐VCH Verlag
数据来源: WILEY
摘要:
AbstractSulfonation of 11‐methylene‐1,6‐methano[10]annulene (6a) with1, 3, 4 or 6 equivalents of the dioxane‐SO3complex in dioxane results in the formation of the 2‐sulfonic acid (6b) as the exclusive1H NMR detectable product, whereas 1,6‐methano‐[10]annulene (5a) with 3 equiv. of this sulfonating agent already yields the 2,7‐disulfonic acid. The lower reactivity of the peripheral ring of 6a compared with that of 5a is explained in terms of a higher coplanarity of the annu
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