cas 25447-66-9, dihydroergocryptine | Articles data ｜lookchem

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25447-66-9

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Synthesis of European pharmacopoeial impurities A, B, C, and D of cabergoline
For the use of analytics, European pharmacopoeial impurities A, B, C, and D of cabergoline were synthesized. Ergocryptine was chosen as a starting material and synthesis was accomplished via two approaches, different in length and stereochemical outcome. A longer, indirect approach was realized through otherwise problematic oxidations of the 9,10-dihidrolysergol derivative, to the corresponding aldehyde and carboxylic acid. This was achieved by the use of activated DMSO and a Pinnick oxidation sequence. All four synthesized impurities are used as analytical standards in cabergoline manufacturing processes.
Wagger, Jernej,Pozes, Aljaz,Pozgan, Franc
p. 23146 - 23156
(2013/11/19)

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511-09-1
α-ergocryptine

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Chemical Properties

Melting Point: 235 °C (decomp)
Boiling Point: 848.7°C at 760 mmHg
Flash Point:467.1°C
Density: 1.36g/cm³
Solubility:DMSO (Slightly), Methanol (Slightly), Pyridine (Slightly)
Storage Temp.:Hygroscopic, -20°C Freezer, Under inert atmosphere
Vapor Pressure: 1.26E-30mmHg at 25°C
PKA: pKa 6.89±0.07(H2O t=24 I≤0.01) (Uncertain)
PSA: 121.70000
LogP: 3.17460

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