Fragmentation of acid chlorides and azides of?-amino acids having a tertiary nitrogen atom, and some other properties of these amino acids (copper complexes)

1963 ◽  
Vol 12 (6) ◽  
pp. 977-984
Author(s):  
Vyach I. Maksimov
Keyword(s):  
Amino Acids ◽  
Nitrogen Atom ◽  
Copper Complexes ◽  
Acid Chlorides ◽  
Tertiary Nitrogen Atom ◽  
Tertiary Nitrogen

The constituents of Cryptocarya pleurosperma White & Francis. I. Pleurospermine: A new alkaloid of the leaves

1959 ◽  
Vol 12 (1) ◽  
pp. 90 ◽  
Author(s):  
E Gellert
Keyword(s):  
Nitrogen Atom ◽  
Oxygen Atom ◽  
Hydroxyl Group ◽  
Veratric Acid ◽  
The Third ◽  
Tertiary Nitrogen Atom ◽  
Group A ◽  
Francis I ◽  
Alcoholic Hydroxyl ◽  
Tertiary Nitrogen

A new alkaloid pleurospermine, C14Hl9O3N, has been isolated from the leaves of Cryptocarya pleurosperma. Pleurospermine contains a methoxyl group, a phenolic hydroxyl group, and a tertiary nitrogen atom. The third oxygen atom is possibly present as an alcoholic hydroxyl group. On heating with palladium-charcoal the alkaloid yields 4-hydroxy-3-methoxyacetophenone (I), while methylation followed by oxidation gives veratric acid.

LYCOPODIUM ALKALOIDS: XVI. ANNOTINE

1964 ◽  
Vol 42 (11) ◽  
pp. 2584-2594 ◽  
Author(s):  
W. A. Szarek ◽  
K. A. H. Adams ◽  
M. Curcumelli-Rodostamo ◽  
D. B. MacLean
Keyword(s):  
Double Bond ◽  
Nitrogen Atom ◽  
Hydroxyl Group ◽  
Tertiary Nitrogen Atom ◽  
Chemical Studies ◽  
Group A ◽  
Instrumental Methods ◽  
Tertiary Hydroxyl ◽  
Plausible Structure ◽  
Tertiary Nitrogen

Annotine, C16H21O3N, is shown to be pentacyclic and to contain a tertiary hydroxyl group, a lactone function, a tertiary nitrogen atom, and a dialkylated double bond. The position of the double bond and the tertiary hydroxyl group relative to the nitrogen atom has been established by Emde degradation of annotine methiodide. The presence of a lactone function is inferred from the reduction of annotine to dihydroannotinol, a hemiacetal, which reacts with 1 mole of ethyl mercaptan. The reduction of the lactone to a diol in an annotine derivative has been carried out. The chemical studies and the examination of annotine and its derivatives by modern instrumental methods allow the assignment of a plausible structure to the alkaloid.

The Alkaloids of Kopsia longiflora Merrill. I. Isolation of the Alkaloids

1955 ◽  
Vol 8 (1) ◽  
pp. 129 ◽  
Author(s):  
WD Crow ◽  
M Michael
Keyword(s):  
Nitrogen Atom ◽  
Rain Forest ◽  
Forest Tree ◽  
Triterpene Alcohol ◽  
Carbonyl Groups ◽  
Alcohol Acetate ◽  
Ultraviolet Spectra ◽  
Tertiary Nitrogen Atom ◽  
Neutral Media ◽  
Tertiary Nitrogen

The bark and leaves of the rain-forest tree Kopsia longiflora Merrill (Apocynaceae) contain four new alkaloids ; kopsinine, C21H26O2N2, (0.2 per cent.), kopsilongine, C24H30O6N2 (0.06 per cent.), and kopsamine, C25H30O7N2 (0.02 per cent.) occurring in the bark ; and kopsilongine (0.07 per cent.), kopsamine (0.3 per cent.), and kopsiflorine, C23H28O5N2, (0.04 per cent.) in the leaves. The bark also contains β-amyrin (0.35 per cent.) while the leaves afford a mixture of paraffin hydrocarbons, mainly n-hentri- acontane, β-sitosterol, a sterol, C29H50O2, and a triterpene alcohol acetate, C32H52O2. Kopsamine, kopsilongine, and kopsiflorine each contain two methoxyl groups, while kopsinine contains only one ; kopsamine and kopsilongine also contain methylene-dioxy-groups. No reactive carbonyl groups were detected. The alkaloids all titrated as monoacid bases and formed monomethiodides: while the ultraviolet spectra recorded in acid and neutral media show that the basic (tertiary) nitrogen atom does not contribute to the chromophoric system.

The use of 7-(2-bromoethoxy)coumarin for the quantitative fluorometric analysis of drug preparations containing a tertiary nitrogen atom

1985 ◽  
Vol 19 (6) ◽  
pp. 430-434
Author(s):  
A. Z. Abyshev ◽  
V. G. Klimov ◽  
S. S. Krylov ◽  
E. V. Semenov ◽  
I. P. Sidorova
Keyword(s):  
Nitrogen Atom ◽  
Tertiary Nitrogen Atom ◽  
Fluorometric Analysis ◽  
Tertiary Nitrogen

Lead thiolates. The formation of water-soluble lead(II) thiolates and the crystal structure of 2-(Morpholin-4-yl)ethanethiolatolead(II) nitrate

1981 ◽  
Vol 34 (1) ◽  
pp. 57 ◽  
Author(s):  
IG Dance ◽  
PJ Guerney
Keyword(s):  
Crystal Structure ◽  
Nitrogen Atom ◽  
Aqueous Media ◽  
Water Soluble ◽  
Crystal Data ◽  
Conjugate Acid ◽  
Thiolate Ligand ◽  
Tertiary Nitrogen Atom ◽  
Thiolate Complexes ◽  
Tertiary Nitrogen

The solubilized thiolate ligand 2-(morpholin-4-yl)ethanethiolate, mes, and its ammonium conjugate acid, Hmes, form crystalline complexes Pb2(Hmes)3(N03)4, Pb(mes)2, Pb(mes)(N03), Pb(mes)- (O2CCH3) and Pb(mes)(O2CCF3). These lead(II) thiolate complexes are soluble in aqueous media. Crystals of Pb(mes)(NO3) contain chains of alternating lead and bridging thiolate sulfur atoms [Pb-S 2.646(4), 2.793(4) �], with the lead coordinated also by the tertiary nitrogen atom [Pb-N 2.61(1) �]. The nitrate ions weakly bridge lead atoms along the chain [Pb-O 2.69(2), 2.88(2), 2.98(2), 3.03(2) �]. Crystal data: Pbca, a l3.396(2), b 21.900(3), c 7.348(1) �, Z 8(x PbSN2O4- C6H12), 1602 observed data, R 0.057.

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