A new enantioselective version of the Nazarov cyclization is reported. The reaction design uses readily available alkenynones to trigger a gold(I)-catalyzed anti-Michael hydroarylation of the ynone followed by Nazarov cyclization. A chiral gold complex is able to control the absolute stereochemistry of the process. Cyclopenta[c]chromenones, which combine the 2H-chromene and cylopentanone cores, are
报道了纳扎罗夫环化的新对映选择性版本。该反应设计使用容易获得的烯炔酮来触发炔酮的
金(I)催化的反迈克尔加氢芳基化,然后进行纳扎罗夫环化。手性
金络合物能够控制该过程的绝对立体
化学。环戊[ c ]
色酮结合了 2 H-色烯和
环戊酮核心,合成时具有高产率和ee值。