Appearance: white crystalline powder
Specific rotation[a]D20: +59~+61° (c=1，AcOH)
Melting point: 134-137℃
Loss on drying: 0.50% max
N-Boc-D-proline; Boc-D-Pro-OH 37784-17-1 is the proline derivative utilized in Boc SPPS. D-Proline has a secondary amine, so it does not produce a blue or purple color when reacted with ninhydrin. To test the completion of coupling to D-proline residues, the isatin test or one of the alternate tests should be used.
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