Nitrostyrene Derivatives of Adenosine 5′-Glutarates Modified with an Alkyl Spacer and their inhibitory activity on epidermal growth factor receptor protein tyrosine kinase
β-Nitrostyrene derivatives of adenosine5′-glutarates are potent and selective bisubstrate-type inhibitors of the epidermalgrowthfactorreceptorproteintyrosinekinase (EGF-R PTK). In an attempt to improve the inhibitoryactivity, this type of compounds was modified with alkylspacers of varying length between the nitrostyrene and the glutaryl units. The spacers consisted of 1, 3, 4, and 5 atoms to give