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. 2018 Jun 6;3(6):6120–6133. doi: 10.1021/acsomega.8b00732

Table 2. Comparison of the Yield and Racemization of Z-Gly-Phe-Val-OMe Synthesized Using Various Coupling Reagents.

entry coupling reagent yield (%) racemization (%)
1 HDMB 90 2.9
2 HDMA 90 0.7
3 HBTU 89 5.9
4 HATU 90 1.6
5 TCBOXY 90 n.d.a
a

No racemization could be detected.