Synthesis of [L-3-Deoxymimosine4]-angiotensin I as an approach to the preparation of selective protein-tyrosine kinase (PTK) inhibitors

tert-Boc-L-3-Deoxymimosine (8) was prepared in two steps from tert-Boc-L-asparagine and incorporated into [L-3-deoxymimosine4]-angiostensin I (1), which was prepared as an approach to the design and synthesis of selective protein-tyrosine kenase (PTK) inhibitors.