Studies on diazepines. XXV. Syntheses of fully unsaturated 1, 4-oxazepines and 1H-1, 4-diazepines using photochemical valence isomerization of tricycloheptene …

J KURITA, K IWATA, T TSUCHIYA

Index: Chemical & Pharmaceutical Bulletin, , vol. 35, # 8 p. 3166 - 3174

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Citation Number: 23

Abstract

... Vol. 35 (1987) ... This difference in chemical shifts may arise from the shielding effect of the phenyl group on the azetidine ring, and thus the tricyclic compounds are considered to be anti-endo stereostructures 18 shown in Chart 2. Consequently 15 and 16 also seem to have anti ...