Mitsunobu-initiated cascade cyclization of p-quinamines and 2-furanylmethanols: highly regio- and diastereoselective synthesis of functionalized hydrobenzo[c,d]indoles

Abstract

A cascade cyclization of para-quinamines and 2-furanylmethanol has been achieved, affording a series of functionalized hydrobenzo[c,d]indoles in moderate to good yields and excellent diastereoselectivities under mild conditions. This reaction was first initiated by the Mitsunobu reaction and then followed by the [4 + 2] Diels–Alder reaction to furnish the important indole-fused heterocyclic derivatives.