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Purification of Laboratory Chemicals, 8th Edition by W.L.F. Armarego

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O-Phospho-L-tyrosine (L-tyrosine-O-phosphate) [21820-51-9] C9H12NO6P, M 261.2, m 225°, 227°, 253°, [α]D20 -5.5 (c 1, H2O), -9.2 (c 1, 2N HCl), pKEst(1)~ 1.6 (PO4H2), pKEst(2)~ 2.02 (CO2H), pKEst(3)~ 5.65 (PO4H), pKEst(4) 9.2 (NH3+). Purify it by recrystallisation from H2O or H2O/EtOH. [Levene & Schormüller J Biol Chem 100 583 1933, http://www.jbc.org/content/100/2/583; Posternak & Graff Helv Chim Acta 28 1258 1945, DOI: 10.1002/hlca.6602801179; Beilstein 14 III 1510.]

Phytol (d-2E-3,7R,11R,15-tetramethylhexadec-2-en-1-ol) [150-86-7, 7541-49-93] C20H40O, M 296.5, b 145°/0.03mm, 150-151°/0.06mm, 203-204°/10mm, d425 0.8497, nD25 1.437, [α]D22 + 0.06 (neat). This acyclic triterpene is commercially available as a mixture of isomers. Phytol is purified ...

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