An Efficient One Pot Synthesis of New Indanopyrazoline and Indanopyrazole Derivatives

Synthesis of a series of novel fused pyrazolines and pyrazoles has been accomplished in good yields by regio- and diastereoselective 1,3-dipolar cycloaddition of enamines of indan-1-one 1a-c towards C-aryl-N-phenylnitrilimines 2df. The structure of the cycloadducts was elucidated by 1D and 2D NMR studies.