Highly diastereoselective rhodium(II) acetate-catalysed intramolecular addition of α-diazo ketones to aromatic rings to form the azulenones 3 has been achieved; the norcaradiene form of 3 undergoes efficient stereospecific cycloaddition with phenyltriazolinedione, in either a stepwise or a tandem process, leading to the pentacyclic systems 4 as a single diastereomer in each case.
已实现高非对映选择性的
醋酸铑(II)催化α-重
氮酮分子内加成到芳环形成并
环庚烯酮3;3的降降
萘二烯形式与苯基三唑烷二酮进行高效的立体专一性环加成,无论是分步还是串联过程,都能得到单一非对映异构体的五环系统4。