Fig. 3

Synthesis of intermediate derivatives (in the case of tryptamine, for example, 5-methoxy tryptamine was also synthesized in this way). (a) Cbz-Cl, K₂CO₃, stir, 12 h. (b) Et₃N, Boc₂O, stir. (c) H₂. (d) ACN, K₂CO₃, reflux, 24 h. (e) TCM: TFA (1:1), stir, 4 h.