Premium
Über die Struktur der Guaj‐azulen‐sulfosäuren
Author(s) -
Meier W.,
Meuche Doris,
Heilbronner E.
Publication year - 1963
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19630460610
Subject(s) - chemistry , oleum , conjugate , acetic anhydride , acetic acid , thioamide , medicinal chemistry , organic chemistry , catalysis , mathematical analysis , mathematics
Sulphonation of guaiazulene ( 1 ) with sulphuric acid in acetic acid anhydride is known to give guaiazulene‐1‐sulphonic acid ( 2 ). It is shown that sulphonation of ( 1 ) with oleum yields the isomers ( 3 ) and ( 4 ), carrying the sulphonic group in position 2 and on the 1‐methylgroup, respectively. The UV. and NMR. spectra of the compounds ( 2 ), ( 3 ) and ( 4 ) and of their conjugate acids ( 6 ), ( 7 ) and ( 8 ) are discussed.