Results 121 to 130 of about 5,616 (175)

Isoquinoline Alkaloids and Chemotaxonomy

2019
The isoquinoline alkaloids are a class of secondary metabolites classified into different groups, being the aporphinoids the most representative class. They are considered the second-largest class of alkaloids in terms of structural diversity staying behind only of indole alkaloids.
Anderson R. dos Santos, Nelissa P. Vaz
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Metabolic Engineering in Isoquinoline Alkaloid Biosynthesis

Current Pharmaceutical Biotechnology, 2007
Higher plants produce diverse classes of metabolites. Metabolic engineering offers tremendous potential to improve the production and quality of these chemicals. This report summarizes the possibility of using metabolic engineering in benzylisoquinoline alkaloid biosynthesis.
Fumihiko, Sato, Takayuki, Inui, Tomoya, Takemura   +2 more
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Antimicrobial Activity of Some Isoquinoline Alkaloids

Archiv der Pharmazie, 1991
AbstractThe isoquinoline alkaloids are of great importance to humanity because of their medicinal value and different structure. During the last ten years, many isoquinoline alkaloids were isolated from Fumaria and Corydalis species growing in Turkey1—6).There have been many researches on the antimicrobial activity of extracts of higher plants, but ...
U, Abbasoglu, B, Sener, Y, Günay, H, Temizer   +3 more
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Extractions of isoquinoline alkaloids with butanol and octanol

Fitoterapia, 2010
Six different isoquinoline alkaloids (sanguinarine, chelerythrine, berberine, coptisine, allocryptopine, and protopine) were extracted by butanol and octanol from aqueous solution, pH 4.5. The samples were analyzed by HPLC. Butanol extraction was non-selective, alkaloids passed into organic phase in 83-98%.
Jana, Gregorová, Jan, Babica, Radek, Marek, Hana, Paulová, Eva, Táborská, Jirí, Dostál   +5 more
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Isoquinoline alkaloids

Neurochemical Research, 1978
Representatives of eleven different classes of isoquinoline alkaloids inhibit Na+, K+-ATPase and Mg2+-ATPase in rat brain microsomal preparations. In most cases the Na+, K+-ATPase is more sensitive than Mg2+-ATPase to inhibition by the alkaloids.
L R, Meyerson, K D, McMurtrey, V E, Davis   +2 more
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The Biosynthesis of Isoquinoline Alkaloids

1985
The tetrahydroisoquinoline skeleton occurs in numerous plant alkaloids. The simplest bearers of this structural unit are exemplified by anhalonidine (12) (Sect. 2). Slightly more elaborate are the benzylisoquinoline alkaloids exemplified at their simplest by reticuline (25) and papaverine (27) (Sect. 3).
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Asymmetric synthesis of isoquinoline alkaloids

Tetrahedron, 1987
Abstract The use of chiral formamidines affixed to variously substituted tetrahydroisoquinolines, allows asymmetric C-C bond forming reactions to occur α- to the amino group. In this manner, a wide variety of (S)-1-alkyl-1,2,3,4-tetrahydroisoquinolines were constructed in > 90% enantiomeric excess.
A.l. Meyers, Daniel A. Dickman, Michael Boes   +2 more
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Isoquinoline and Benzylisoquinoline Alkaloids

1998
Alkaloids that possess an isoquinoline moiety in their structure are among the most common of all alkaloids. More than 4000 compounds of many structural types but with this structural feature are known (Verpoorte et al., 1991). Those treated in this chapter are all derived from a 3,4-dihydroxytyramine (dopamine) precursor that is linked to an aldehyde ...
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ChemInform Abstract: The Isoquinoline Alkaloids

ChemInform, 2000
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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Isoquinoline alkaloids Amarillidaceae. Crinal alkaloids.

All the Materials. Encyclopedic Reference Book., 2022
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