A new access to the 6a-hydroxypterocarpan variabilin was established. Key step of this concise total synthesis is a challenging cyclization of a haloketone via halogen-metal exchange and subsequent intramolecular addition to the carbonyl function.
建立了6a-hydroxypterocarpan variabilin的新途径。这种简洁的全合成的关键步骤是通过卤素
金属交换以及随后分子内加成羰基官能团,使卤代酮具有挑战性的环化反应。