CONVERSION OF NEOABIETIC ACID INTO MANOOL

1966 ◽  
Vol 44 (21) ◽  
pp. 2575-2579 ◽  
Author(s):  
Ernest Wenkert ◽  
J. R. Mahajan ◽  
M. Nussim ◽  
F. Schenker
Keyword(s):  
Neoabietic Acid

not available

The Thermal Isomerization of Neoabietic Acid

1957 ◽  
Vol 79 (6) ◽  
pp. 1497-1499 ◽  
Author(s):  
Virginia M. Loeblich ◽  
Ray V. Lawrence
Keyword(s):  
Thermal Isomerization ◽  
Neoabietic Acid

scholarly journals Chemical Composition of Natural Colophony from Pinus Brutia and Comparison with Synthetic Colophony

2010 ◽  
Vol 5 (11) ◽  
pp. 1934578X1000501 ◽  
Author(s):  
Ahmet C. Gören ◽  
Gökhan Bilsel ◽  
Alp Hakan Öztürk ◽  
Gulaçtı Topçu
Keyword(s):  
Chemical Composition ◽  
Essential Oils ◽  
Acid Content ◽  
Resin Acids ◽  
Capillary Gc ◽  
Pinus Brutia ◽  
Neoabietic Acid ◽  
Natural Resins ◽  
Main Components

The compositions of colophony resins obtained from Pinus brutia Ten trees by three different methods (acid paste, carved hole and scraping) from Ayvacık, Gökova and Kemalpaşa in Turkey were analyzed by capillary GC-MS. The main components were the monoterpenes α-pinene, β-pinene, and Δ3-carene, and the diterpenic resin acids palustric, abietic, kaur-9(11)-16-en-18-oic and neoabietic acid. The synthetic colophony resins exhibited similar contents to those of the natural resins obtained from the Gökova and Kemalpaşa regions of Turkey. However, colophony resins from Ayvacık exhibited only half the diterpenic acid content as those of the Gökova and Kemalpaşa resins. Out of the three techniques, the carved hole method caused rather different percentages in the constituents of the essential oils.

Fate of Conifer Terpenes in a Polyphagous Folivore: Evidence for Metabolism by Gypsy Moth (Lepidoptera: Lymantriidae)

2003 ◽  
Vol 38 (4) ◽  
pp. 583-601 ◽  
Author(s):  
Jaimie S. Powell ◽  
Kenneth F. Raffa
Keyword(s):  
Host Range ◽  
Gypsy Moth ◽  
Lymantria Dispar ◽  
Gut Bacteria ◽  
Bornyl Acetate ◽  
Substantial Portion ◽  
Isopimaric Acid ◽  
Body Tissues ◽  
Diterpene Acids ◽  
Neoabietic Acid

Conifers comprise a substantial portion of the host range of the gypsy moth, Lymantria dispar L. In this study, the effects and fates of the predominant conifer phytochemicals, monoterpenes and diterpene acids, were determined. Gypsy moth larvae were fed physiological levels of three monoterpenes (bornyl acetate, limonene, and myrcene) and two diterpene acids (isopimaric acid and neoabietic acid) for the duration of their second, third, and fourth stadia. Frass was collected daily, and larvae and exuviae were collected after the completion of the stadium. These samples were chemically analyzed for parent terpenes or their metabolites. Overall, gypsy moth larvae were highly tolerant of all terpenes administered, despite some treatment effects. Limonene, myrcene, isopimaric acid, and neoabietic acid were not recovered suggesting that, once ingested, these terpenes were converted into other products. Bornyl acetate was metabolized in part to borneol and also was recovered in small quantities from frass. Its metabolite borneol was mostly excreted, with a small amount remaining in body tissues. Additional experiments were performed, determining that monoterpenes were effectively ingested, and that monoterpenes were not lost substantially through volatilization from diet or larvae. There was no evidence that terpene metabolism was due to P450 enzymes or esterases, although these results are inconclusive. Gut bacteria do not appear to be primarily responsible for terpene metabolism.

scholarly journals Ureido Derivatives of Neoabietic Acid

Molbank ◽  
10.3390/m1033 ◽  
2018 ◽  
Vol 2018 (4) ◽  
pp. M1033
Author(s):  
Xinyu Gao ◽  
Niping Feng ◽  
Yuhan Zi ◽  
Jianguo Cao ◽  
Guozheng Huang
Keyword(s):  
Spectral Analysis ◽  
1H Nmr ◽  
13C Nmr ◽  
Structure Characterization ◽  
Curtius Rearrangement ◽  
Neoabietic Acid ◽  
Rearrangement Reaction ◽  
Derivatives Of

A series of ureido derivatives of neoabietic acid were synthesized by application of Curtius rearrangement reaction to neoabietic acid and amines. Structure characterization of these compounds was done by 1H-NMR, 13C-NMR and HRMS spectral analysis.

Resin Acids. I. An Improved Method of Isolation of Resin Acids; The Isolation of a New Abietic-Type1Acid, Neoabietic Acid

1948 ◽  
Vol 70 (1) ◽  
pp. 334-339 ◽  
Author(s):  
George C. Harris ◽  
Thomas F. Sanderson
Keyword(s):  
Resin Acids ◽  
Improved Method ◽  
Neoabietic Acid

Resin Acids. II. The Structure of Neoabietic Acid

1948 ◽  
Vol 70 (1) ◽  
pp. 339-343 ◽  
Author(s):  
George C. Harris ◽  
Thomas F. Sanderson
Keyword(s):  
Resin Acids ◽  
Neoabietic Acid

Kinetics of the Acid-catalyzed Isomerization of Neoabietic Acid in Anhydrous Ethanol

1950 ◽  
Vol 72 (3) ◽  
pp. 1197-1200 ◽  
Author(s):  
Paul F. Ritchie ◽  
Lane F. McBurney
Keyword(s):  
Anhydrous Ethanol ◽  
Neoabietic Acid ◽  
Acid Catalyzed ◽  
Kinetics Of
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