Preparation of N-Alkylnorpavines via Competitive N-Dealkylation of Quaternary Pavines
摘要:
N-Alkyl quaternary pavine salts were converted into N-alkyl tertiary pavines by refluxing ethanolamine, via a competitive N-dealkylation mechanism. The following N-dealkylation order was observed: benzyl > allyl > Me > Et > Pr-n greater than or equal to (n)Bu. Further study indicated that N-alkyl- and N-acylpavines could be obtained from N-methyl tertiary pavines in a one-pot reaction (acid anhydride/allyl bromide or alkyl halide, reflux). This finding provides an alternative method for preparing N-alkyl tertiary pavines.
Preparation of N-Alkylnorpavines via Competitive N-Dealkylation of Quaternary Pavines
摘要:
N-Alkyl quaternary pavine salts were converted into N-alkyl tertiary pavines by refluxing ethanolamine, via a competitive N-dealkylation mechanism. The following N-dealkylation order was observed: benzyl > allyl > Me > Et > Pr-n greater than or equal to (n)Bu. Further study indicated that N-alkyl- and N-acylpavines could be obtained from N-methyl tertiary pavines in a one-pot reaction (acid anhydride/allyl bromide or alkyl halide, reflux). This finding provides an alternative method for preparing N-alkyl tertiary pavines.