Mechanistic Diversity of the van Leusen Reaction Applied to 6-Ketomorphinans and Synthetic Potential of the Resulting Acrylonitrile Substructures
作者:Johannes Schütz、Petra Windisch、Elka Kristeva、Klaus Wurst、Karl-Hans Ongania、Ulrike E. I. Horvath、Herwig Schottenberger、Gerhard Laus、Helmut Schmidhammer
DOI:10.1021/jo050362v
日期:2005.6.1
8-tetradehydromorphinan-6-carbonitriles. Addition of nucleophiles such as Li diisopropylamide or Grignard reagents to the acrylonitrile substructure yielded ring-opened 5,6-didehydro products. Seven products were characterized by X-ray crystal structure analysis and revealed insight into the mechanistic diversity of the van Leusen reaction.
甲苯磺酰基甲基异氰化物用于将7,8-二氢-6-吗啡酮转化为6,7-二氢吗啡-6-腈,并保留了4,5-环氧环。然而,在NaH存在下开环发生,得到5,6,7,8-四氢吗啡喃-6-腈。将亲核试剂如锂二异丙基酰胺或格利雅试剂添加到丙烯腈亚结构中,得到开环的5,6-二氢加氢产物。通过X射线晶体结构分析对7种产物进行了表征,并揭示了对Van Leusen反应机理多样性的见解。