Among environmentally benign methods,organocatalysis is at the forefront of contemporary synthetic organic chemistry.Small molecules bearing hydrogen bonding motifs,such as thiourea derivatives,have proven to be effective non-covalent catalysts for a large variety of transformations.[1,2] In this context,the development of bifunctional catalysts by incorporating a Lewis basic functionality and a thiourea moiety in one chiral scaffold is the most active research area and has found widespread applications in various asymmetric transformations [3-8].