The powerful effect of N-aryl substitution in promoting the thermal rearrangement of 5-spirocyclopropaneisoxazolidines
摘要:
N-Alkyl 5-spirocyclopropaneisoxazolidines rearrange to tetrahydropyridone derivatives by heating. The presence of a phenyl ring on the nitrogen atom significantly reduces the rearrangement temperature. This effect is enhanced by electron-donating substituents and reduced by electron-withdrawing substituents on the phenyl ring. (C) 1999 Elsevier Science Ltd. All rights reserved.
The powerful effect of N-aryl substitution in promoting the thermal rearrangement of 5-spirocyclopropaneisoxazolidines
摘要:
N-Alkyl 5-spirocyclopropaneisoxazolidines rearrange to tetrahydropyridone derivatives by heating. The presence of a phenyl ring on the nitrogen atom significantly reduces the rearrangement temperature. This effect is enhanced by electron-donating substituents and reduced by electron-withdrawing substituents on the phenyl ring. (C) 1999 Elsevier Science Ltd. All rights reserved.