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1H dynamic nuclear magnetic resonance study of hindered rotations in N??aryl??N??benzyl alkyl carbamates

S Julia, A Ginebreda, P Sala, M Sancho…

文献索引:Julia, S.; Ginebreda, A.; Sala, P.; Sancho, M.; Annunziata, R.; Cozzi, F. Organic Magnetic Resonance, 1983 , vol. 21, # 9 p. 573 - 575

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被引用次数: 10

摘要

Abstract The NMR variable temperature behaviour of a series of N-aryl-N-benzyl alkyl carbamates was investigated. The barrier to rotation about the N-aryl bond was determined for all the compounds studied. The values obtained, which are in good agreement with those found for structurally related N-aryl-N-benzylamides, are in the range ΔG≠= 60.7-89.6 kJ mol− 1. For some carbamates another conformational phenomenon has been observed, ...