N-BOC-??-caprolactam (CAS 106412-36-6) has a molecular formula of C??H??NO? and a molecular weight of 227.30 g/mol, with a tert-butyloxycarbonyl (BOC) protecting group attached to the nitrogen of the ??-caprolactam ring. As a protected lactam, it is widely used in peptide synthesis and pharmaceutical R&D to shield the amide nitrogen, enabling selective reactions. It requires sealed, cool, dry storage to avoid BOC group cleavage or ring hydrolysis, ensuring structural stability for synthetic processes.