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Stereostructure of condensed‐skeleton cis ‐ and trans ‐dihydro‐1,3‐thiazines and 1‐thia‐3‐azaspiroalkenes
Author(s) -
Sohár P.,
Simon L.,
Bernáth G.
Publication year - 1984
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270220916
Subject(s) - skeleton (computer programming) , stereochemistry , chemistry , computer science , programming language
The stereostructures of some condensed‐skeleton cis ‐ and trans ‐dihydro‐1,3‐thiazines and 1‐thia‐2‐phenyl‐3‐azaspiro[4 n + 1]alk‐2‐enes ( n = 3–6) were established by 1 H and 13 C NMR spectroscopy. A comparative study indicated that the cis ‐thiazines have greater conformational mobility than the corresponding oxazines, although the preferred conformer of the two types of cis compounds is the same, with the sulphur axial and the 4‐methylene group equatorial relative to the rings.