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Stereochemical studies-XXXIII. Saturated heterocycles-IX: Synthesis and conformations of stereoisomeric cis- and troans-tetramethylene- and pentamethylenedihydro-1,3-oxazines

✍ Scribed by G. Bernáth; F. Fülöp; L. Gera; L. Hackler; A. Kálmán; Gy. Argay; P. Sohár

Publisher: Elsevier Science
Year: 1979
Tongue: French
Weight: 655 KB
Volume: 35
Category: Article
ISSN: 0040-4020
DOI: 10.1016/0040-4020(79)80097-6

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## Abstract The configuration and conformation of __Z__‐ and __E__‐__N__‐methyl‐ and ‐__N__‐benzyl‐2‐__p__‐nitrophenyl‐4,5‐, and ‐5,6‐tetramethylenetetrahydro‐1,3‐oxazines were determined by ^1^H and ^13^C NMR spectroscopy. The __Z__ isomers were proved to be conformationally homogeneous, having th