摘要:
                                tert-Boc-L-3-Deoxymimosine (13) and tert-Boc-D-Deoxymimosine (16) were prepared in two steps from tert-Boc-L-asparagine and tert-Boc-D-asparagine, respectively. Both 13 and id were determined to be optically pure by derivatization with Marphey's reagent. Activation and coupling of 16 to L-isoleucine methyl ester resulted in a diastereomeric mixture of products containing 96% of the DL diastereomer and 4% of the LL diastereomer. [L-3-Deoxymimosine(4)]-angiotensin I war synthesized from 13 as an approach to the design and synthesis of selective protein-tyrosine kinase (PTK) inhibitors.