𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A stereospecific conversion of berberine into (±)-β-hydrastine

✍ Scribed by Maurice Shamma; David M. Hindenlang; Tai-Teh Wu; Jerome L. Moniot

Publisher
Elsevier Science
Year
1977
Tongue
French
Weight
195 KB
Volume
18
Category
Article
ISSN
0040-4039

No coin nor oath required. For personal study only.

✦ Synopsis

The conversion of berberine (1) into a I:2 mixture of (A)-c(-hydrastine (3) and (+)-6hydrastine (4) through the intermediacy of 8-methoxyberberinephenolbetaine

(2) has been recorded.2

The betaine 2 can be obtained by means of the ferricyanide oxidation of berberine, followed by treatment with methanolic hydrogen chloride, 2 or alternatively by photooxidation of berberine. 3

📜 SIMILAR VOLUMES

High-performance liquid chromatography d
High-performance liquid chromatography determination of hydrastine and berberine in dietary supplements containing goldenseal
✍ Ehab A. Abourashed; Ikhlas A. Khan 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 163 KB

Goldenseal (Hydrastis canadensis L., Ranunculaceae) is an ingredient of various dietary supplements intended for enhancing general body immunity. Many goldenseal products are currently available in the United States, either alone or in combination with echinacea. In most products, the content of the

Stereospecific conversion of P-chiral nu
Stereospecific conversion of P-chiral nucleoside phosphorothioates into [18O]phosphates
✍ Piotr Guga; Andrzej Okruszek 📂 Article 📅 1984 🏛 Elsevier Science 🌐 French ⚖ 210 KB

P-chiral phosphorothioate analogs of thymidine and adenosine nucleotides are transformed in high yield with retention of configuration by [180]chloral and [l80]styrene oxide into corresponding nucleoside [l\*O]phosphates. It has been shown in our recent reports that 18 0-labelled reagents such as di

Transfer hydrogenation: A stereospecific
Transfer hydrogenation: A stereospecific method for the conversion of nitro alkanes into amines
✍ Anthony G.M. Barrett; Christopher D. Spilling 📂 Article 📅 1988 🏛 Elsevier Science 🌐 French ⚖ 104 KB

A series of nitro alkanes were converted into the corresponding amines with re:ention of configuration by transfer hydrogenation using ammonium formate and palladium on carbon. Recently we needed a mild, rapid procedure for the conversion of fl-nitro alcohols into the corresponding hydroxy amines w