Ergot: Difference between revisions
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===Paspalic acid=== | ===Paspalic acid=== | ||
Paspalic acid is an isomer of lysergic acid, and will spontaneously convert. Jean-Claude Gaullier's 2000 [https://patents.google.com/patent/US6242603B1/en patent] specifies a high-yield (81.6% RRi, 2.8% iso-LA) isomerization using a tetra(C1-C6)alkylammonium hydroxide. In that same patent, he cites previous isomerizations using 2N sodium hydroxide or 0.5N potassium hydroxide, reporting 59.3% RRi with NaOH (6.8% iso-LA) and 49.8% RRi with KOH (1% iso-LA), described in the Swiss journal Helvetica Chimica Acta in 1981 and 1964, respectively. [https://patents.google.com/patent/WO2005082902A1/en Cvac + Mojczek claimed] to do even better purity-wise in 2005 by following the metallic hydroxide with a methanol wash. | Paspalic acid is an isomer of lysergic acid, and will spontaneously convert. Jean-Claude Gaullier's 2000 [https://patents.google.com/patent/US6242603B1/en patent] specifies a high-yield (81.6% RRi, 2.8% iso-LA) isomerization using a tetra(C1-C6)alkylammonium hydroxide. In that same patent, he cites previous isomerizations using 2N sodium hydroxide or 0.5N potassium hydroxide, reporting 59.3% RRi with NaOH (6.8% iso-LA) and 49.8% RRi with KOH (1% iso-LA), described in the Swiss journal <i>Helvetica Chimica Acta</i> in 1981 and 1964, respectively. [https://patents.google.com/patent/WO2005082902A1/en Cvac + Mojczek claimed] to do even better purity-wise in 2005 by following the metallic hydroxide with a methanol wash. | ||
===Extraction of ergopeptines from ergot broth=== | ===Extraction of ergopeptines from ergot broth=== | ||