cas 5497-76-7, tert-Butyl L-prolinate hydrochloride

The easily available 2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane 2,4-disulfide (Lawesson's Reagent), 1, has been tested as a coupling reagent for racemization in peptide synthesis.The assay procedure is separation of stereomeric products by HPLC.Z-S-Pro-S-Val-S-Pro-OtBu and Z-S-Leu-S-Phe-S-Val-OtBu have been used as test peptides in 2+1 segment couplings, and only a small amount of epimerization (0.5 and 0.1percent, respectively) has been observed.

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Chemical Properties

Appearance/Colour :white - off-white powder

Melting Point: 110-112ºC

Boiling Point: 219.2 ºC at 760 mmHg

Flash Point:86.4 ºC

Storage Temp.:0-6°C

Vapor Pressure: 0.121mmHg at 25°C

BRN: 3596764

PSA: 38.33000

LogP: 2.21090

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