Ionic-liquid-mediated macmillan's catalyst for diels-alder reaction

Ionic liquids were used to enhance as well as recycle the macmillan's catalyst 1 for the diels-alder reaction. using our developed protocol,diels-alder adducts were obtained in good yields and selectivities along the 6 times recycling of macmillan's imidazolidinone catalyst 1. synthesis of steroid 4 is the major outcome of our developed protocol. © 2013 vivek srivastava.