Sequences of model peptides synthesized^a.

Entry	A	B	%
1	Ac-DTTAD′A-NH2	H-SNVKAQFL-NH2	78.2b, 36.6c
2	Ac-SRQQGESNQERGARD′RL-NH2	H-SKAKL-NH2	80.0b, 39.4c
3	Ac-D′SERVELRKLQDV-NH2	H-SKAKL-NH2	95.0b, 39.1c
4	H-VIGGVGD′N-NH2	H-TLHAPTD-OH	89.6b, 32.8c
5	Ac-DTTAD′A-NH2	Ac-(K–S)SKAKL-NH2	90.5b, 48.5c
6	Ac-SRQQGESNQERGARD′RL-NH2	Ac-(K–S)SKAKL-NH2	91.9b, 53.0c
7	Ac-SRQQGESNQERGARD′RL-NH2	Ac-(K–S)SARKYFAGNLPE-NH2	95.6b, 37.4c
8	Ac-D′SERVELRKLQDV-NH2	Ac-(K–S)SKAKL-NH2	88.9b, 33.3c
9	Ac-D′SERVELRKLQDV-NH2	H-NIGTYLP(K–S)NVK-NH2	93.4b, 31.1c
10	Ac-D′SERVELRKLQDV-NH2	Ac-ARE(K–S)TPEP-NH2	>98b, 38.4c
11	Ac-LSQD′RG-NH2	Ac-ARE(K–S)TPEP-NH2	91.7b, 34.7c

^aD′ = Asp(benzofuran), (K–S) = Lys–Ser dipeptide.

^bPercentage conversion to product based on UPLC-MS analysis of the crude reaction mixture.

^cIsolated yield based on ligation.