Processes for the preparation of pancratistatin and pancratistatin analogues. The key step is the reaction of a 1,3-dioxan-5-one and a nitroolefine in the presence of an amine. The process may take place in an enantioselective way when a chiral amine is used. Reduction processes then give new and advanced intermediates that are useful for the preparation of pancratistatin or selected pancratistatin analogues. The reported process also provides a method for the efficient synthesis of nitroenals, starting materials of the synthesis. Analogues of pancratistatin are also provided.
制备pancratistatin和pancratistatin类似物的过程。关键步骤是在胺的存在下,将1,3-二
氧杂
环戊酮和硝基
烯烃进行反应。当使用手性胺时,该过程可能以对映选择性方式进行。然后,还可以通过还原过程得到新的和先进的
中间体,这些
中间体对于制备pancratistatin或选定的pancratistatin类似物非常有用。报告的过程还提供了一种高效合成硝基
烯醛的方法,这是合成的起始材料。还提供了pancratistatin的类似物。