Abstract: The present invention provides a process for preparing a peptide of formula (I): Sub-[L]-[N(R1)-A-C(O)]p—[NH-A-C(O)]n+m—OH ??(I) comprising: (a) reacting an immobilized compound of formula (II): Sub-(L)-[N(R1)-A-C(O)]p—[NH-A-C(O)]n—OH ??(II) with an amino acid ester or peptide derivative of formula (III): H—[NH-A-C(O)]m—O(tBu) ??(III) in the presence of a coupling agent to yield a peptide compound of general formula (IV): Sub-[L]-[N(R1)-A-C(O)]p—[NH-A-C(O)]n+m—O(tBu) ??(IV); (b) removing the tBu (t-butyl) group to produce a solid-support bound carboxylic acid or peptide derivative of general formula (I); wherein n is a positive integer, e.g., 1-10, preferably 1-5; m is a positive integer, and P is 0-1.

Abstract: The present invention provides a process for preparing a peptide of formula (I): Sub-[L]-[N(R1)-A-C(O)]p—[NH-A-C(O)]n+m—OH??(I) comprising: (a) reacting an immobilized compound of formula (II): Sub-(L)-[N(R1)-A-C(O)]p—[NH-A-C(O)]n—OH??(II) ?with an amino acid ester or peptide derivative of formula (III): H—[NH-A-C(O)]m—O(tBu)??(III) ?in the presence of a coupling agent to yield a peptide compound of general formula (IV): Sub-[L]-[N(R1)-A-C(O)]p—[NH-A-C(O)]n+m—O(tBu)??(IV); (b) removing the tBu (t-butyl) group to produce a solid-support bound carboxylic acid or peptide derivative of general formula (I); wherein n is a positive integer, e.g., 1-10, preferably 1-5; m is a positive integer, and P is 0-1.