Scheme 2.

Synthesis of Fmoc‐based SPPS building blocks 1–3. Reagents and conditions: I) TBSOTf, acceptors 13, 14 or 15, DCM, −50 °C. II) Pd(PPh3)4, DMBA, DCM. All=allyl.

Synthesis of Fmoc‐based SPPS building blocks 1–3. Reagents and conditions: I) TBSOTf, acceptors 13, 14 or 15, DCM, −50 °C. II) Pd(PPh3)4, DMBA, DCM. All=allyl.