Unusual retention of isoxazole ring under the influence of 3-(substituted nitrophenyl)-2-isoxazoline during catalytic hydrogenation of isoxazoline-substituted isoxazole systems
作者:Vijay Singh、Samiran Hutait、Gaya P. Yadav、Prakas R. Maulik、Sanjay Batra
DOI:10.1002/jhet.87
日期:2009.7
The cleavage of the isoxazole ring during the Raney-Ni-promoted catalytic hydrogenation is prevented under the influence of 3-(substituted nitrophenyl)-2-isoxazoline in isoxazoline-substituted isoxazole systems produced via 1,3-dipolar cycloaddition either on the Baylis–Hillman derivatives or Grignard products. Unexpectedly, the hydrogenations in these diastereomeric compounds were observed to exclusively
在阮内镍促进的催化加氢过程中,在3-(取代的硝基苯基)-2-异恶唑啉的影响下,异恶唑环的裂解被阻止,该异恶唑啉取代的异恶唑系统是通过在Baylis上的1,3-偶极环加成生成的异恶唑啉取代的异恶唑系统希尔曼衍生品或格利雅产品。出乎意料的是,观察到这些非对映体化合物中的氢化仅产生产物,其中甲氧基羰基和羟基或乙酰基彼此同义地存在。J.杂环化学,(2009)。