Table 3.

Thp protection of the carboxyl group of Fmoc‐protected amino acids.^[a]

Entry	Starting material	Product	Reaction time [min]	Yield [%]
1	Fmoc‐Gly‐OH	Fmoc‐Gly‐OThp	30	80
2	Fmoc‐Ala‐OH	Fmoc‐Ala‐OThp	10	74
3	Fmoc‐Val‐OH	Fmoc‐Val‐OThp	10	76
4	Fmoc‐Asp‐OH	Fmoc‐Asp(Thp)‐OThp	25	79

[a] Unpublished data from our group.