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. Author manuscript; available in PMC: 2011 Oct 13.
Published in final edited form as: J Am Chem Soc. 2010 Oct 13;132(40):14137–14151. doi: 10.1021/ja105044s

Table 11.

Comparison of initial rates for single-component reactions of 1 and 2 under the different conditions shown.a

graphic file with name nihms-238338-t0035.jpg

Entrya Ligand k1 ([M]/min) k2 ([M]/min) k1 / k2
1 --- 1.3 × 10−4 3.5 × 10−4 0.37
2 Boc-Val-OH 4.7 × 10−3 5.2 × 10−3 0.90
3 Ac-Ile-OH 7.6 × 10−3 5.5 × 10−3 1.38
a

See Supporting Information for experimental details.