An asymmetric synthesis of ADDA and ADDA-glycine dipeptide using the b-lactam synthon method

Abstract

The paper describes the synthesis of the W-Boc lactam 4, and demonstrates that it is an important intermediate in the synthesis of dipeptide 5 (X = H, n = 0, R = Me), an analogue of the ADDA-GIu dipeptide 3. In addition we have described a mild method for the preparation of the amino acid salt ADDA-HC1, and provided synthetic methods, and full characterisation for the previously 'elusive' free amino acid ADDA.