N-((9H-Fluoren-9-ylmethoxy)carbonyl)-S-(triphenylmethyl)-L-cysteine → Fmoc-Cys(Trt)-OMe

Participants

Reaction Steps

To a stirred solution of Fmoc-L-Cys(Trt)-OH (2.34 g, 4.00 mmol) in methanol (4.0 mL) and benzene (16 mL) was added TMS-diazomethane (2.40 mL, 4.80 mmol). After 1 hour, the mixture was concentrated in vacuo to afford Fmoc-L-Cys(Trt)-OMe which was used in the next step without purification.

Provenance & Evidence