It has been established that a cationic rhodium(I)/(R)-tol-BINAP or (R)-BINAP complex catalyzes the enantioselective [2 + 2 + 1] cycloaddition of 1,6-enynes, possessing monosubstituted alkene units, with cyclopropylideneacetamides at room temperature through the elimination of ethylene to give bicyclic (cyclopent-2-en-1-ylidene)acetamides with high enantioselectivity.
现已确定,阳离子
铑(I)/(R)-
甲苯基-BINAP或(R)-BINAP络合物催化具有单取代
烯烃单元的1,6-
炔烃的对映选择性[2 + 2 + 1]环加成反应,通过在室温下消除
乙烯,得到环亚丙基乙
酰胺,得到具有高对映选择性的双环(环戊-2-
烯-1-亚烷基)乙
酰胺。