𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Mass spectra of tetrahydroprotoberberine methines

✍ Scribed by L. Dolejš; J. Slavík


Publisher
John Wiley and Sons
Year
1970
Tongue
English
Weight
137 KB
Volume
3
Category
Article
ISSN
1076-5174

No coin nor oath required. For personal study only.


📜 SIMILAR VOLUMES


Detection of 9-methoxy substitution in t
✍ Wilhelm J. Richter; Einar Brochmann-Hanssen 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 German ⚖ 413 KB

## Abstract 9‐Methoxytetrahydroprotoberberines are found to exhibit pronounced (__M__OCH~3~)^+^ ions in their mass spectra as opposed to isomers or homologs lacking such substitution, yet carrying methoxyl substituents at other sites. Locating such substituents originally present, or produced from

Syntheses and electronic absorption spec
✍ Reda M. Abd El-Aal; Hassan A. Shindy; Ahmed Ibrahim M. Koraiem 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 242 KB 👁 2 views

The reaction of a ratio of 1 mole of 5-chloro-3-methyl-1-phenyl pyrazolo-4[2(4)]-dimethine cyanine (1a,b) or (5-chloro-4-formyl-3-methyl-1-phenylpyrazole) 2 with 2 moles of an appropriate 2(4)-heterocyclic quaternary salt afforded the novel pentamethine cyanine dyes (3a-3e). Other reactions of 2 wit