Results 161 to 170 of about 3,128 (180)

ChemInform Abstract: ELECTROPHILIC THIYLATION OF BICYCLIC MONOTERPENES BY HYDROGEN SULFIDE AND 1‐BUTANETHIOL

Chemischer Informationsdienst, 1984
AbstractUntersucht wird die Thiylierung von α‐Pinen (I), β‐Pinen (IV) und Carnphen (V) durch H2S und Butanthiol, die durch Alkylaluminiumhalogenide und Aluminiumhalogenide katalysiert wird.
G. A. TOLSTIKOV, F. YA. KANZAFAROV, U. M. DZHEMILEV, R. G. KANTYUKOVA, L. M. ZELENOVA   +4 more
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ChemInform Abstract: REACTION OF 4‐PHENYL‐1,2,4‐TRIAZOLINE‐3,5‐DIONE (PTAD) WITH BICYCLIC MONOTERPENES

Chemischer Informationsdienst, 1982
AbstractDie Reaktion der bicyclischen Monoterpene (II), (IV), (VII) bzw. (IX) mit der Titelverbindung (I) führt zu den Produkten (III), (V) + (VI), (VIII) bzw. (X).
W. ADAM, O. DE LUCCHI, K. HILL
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Enantioselectivity in the hydrolysis of bicyclic monoterpene acetates with the cultured cells of Nicotiana tabacum

Phytochemistry, 1986
Abstract The enantioselectivity in the hydrolysis of bornyl acetate, isobornyl acetate and isopinocampheyl acetate with the cultured cells of Nicotiana tabacum was investigated. The cultured cells were found to have the ability to hydrolyse enantioselectively the acetates, of which the configuration at the carbon atom bearing the acetoxyl group is R.
Takayuki Suga, Toshifumi Hirata, Shunsuke Izumi   +2 more
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Bicyclic monoterpene diols stimulate release of nitric oxide from skin cells, increase microcirculation, and elevate skin temperature

Nitric Oxide, 2006
Bicyclic monoterpene diols (BMTd) stimulate nitric oxide synthesis in melanoma and neuronal cells, representing cell types arising from embryonic neural crest tissue. This study shows that an equimolar mixture of the BMTd's 2,3-cis/exo-pinanediol and 2,3-cis/exo-camphanediol stimulates nitric oxide synthesis in epithelial cells of the skin ...
David A, Brown, Matthew T, Canning, Stephanie L, Nay, Arely V, Pena, Daniel B, Yarosh   +4 more
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Rearrangements of bicyclic monoterpenes

1970
The stereochemistry of reaction of phenylmagnesium bromide with camphor (43) has been determined. The attempted preparation of the phenyl alcohol (46) by oxymercuration of 2-phenylbornylene (72) resulted in the formation of the vinyl-mercury (81). Consequently the oxymercuration of a number of olefins was carried out to determine the vital structural ...
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Monoterpene Biosynthesis: Isotope Effects Associated with Bicyclic Olefin Formation Catalyzed by Pinene Synthases from Sage (Salvia officinalis)

Archives of Biochemistry and Biophysics, 1994
The three pinene synthases (cyclases) from common sage (Salvia officinalis) catalyze the conversion of geranyl pyrophosphate to the bicyclic olefins (+)-alpha-pinene and (+)-camphene (cyclase I), (-)-alpha-pinene, (-)-beta-pinene, and (-)-camphene (cyclase II), and (+)-alpha-pinene and (+)-beta-pinene (cyclase III), in addition to smaller amounts of ...
K C, Wagschal, H J, Pyun, R M, Coates, R, Croteau   +3 more
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Bicyclic Monoterpene Diols Induce Differentiation of S91 Melanoma and PC 12 Pheochromocytoma Cells by a Cyclic Guanosine‐Monophosphate‐Dependent Pathway

Pigment Cell Research, 1999
Previously, we showed that 5‐norbornene‐2,2‐dimethanol (5‐NBene‐2,2‐DM) is an effective inducer of melanogenesis in cultured cells and guineapig skin [Brown et al. (1998) J. Invest. Dermatol., 110:428‐437]. This study shows that 2,3‐cis/exo‐pinanediol (2,3‐cs/ex‐PinD) is a more effective inducer of melanogenesis than 5‐NBene‐2,2‐DM in S91 mouse ...
D A, Brown, K, Lesiak, W Y, Ren, K L, Strzelecki, A A, Khorlin   +4 more
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Inhibition of hepatic cholesterol synthesis and S-3-hydroxy-3-methylglutaryl-CoA reductase by mono and bicyclic monoterpenes administered in vivo

Biochemical Pharmacology, 1980
The ability of a variety of mono- and bicyclic monoterpenes to inhibit hepatic HMGCoA reductase measured 17 hr after in vivo administration to rats was determined. Of the terpenes tested, menthol and cineole inhibited by 70 per cent, while borneol and methone were slightly less inhibitory (50 per cent) when dosed at the same rate.
R J, Clegg, B, Middleton, G D, Bell, D A, White   +3 more
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Metabolic engineering of the borneol and camphor degradation pathways in Pseudomonas to produce optically pure bicyclic monoterpenes

Enzyme and Microbial Technology
Borneol, a medicinally important bicyclic monoterpene, facilitates drug transport across mucous membranes and the blood-brain barrier. Derivatives of borneol and camphor also have numerous biomedical applications. Borneol is currently industrially synthesized via the conversion of turpentine and α-pinene.
Yi-An, Hong, Aye Aye, Khine, Yu-Wei, Lin, Pei-Yun, Lee, Wei-Xiang, Hong, Anren, Hu, Tzenge-Lien, Shih, Hao-Ping, Chen   +7 more
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Mechanism and regioselectivity of 1,3-dipolar cycloaddition reactions of bicyclic monoterpenes with aryl and heteroaryl nitrile oxides: a DFT study

Canadian Journal of Chemistry, 2015
The reactivity and regioselectivity of 1,3-dipolar cycloaddition reactions of aryl and heteroaryl nitrile oxides (1a–1c) with bicyclic monoterpenes (R)-(+)-a-pinene (2a) and (S)-(–)-b-pinene (2b) have been investigated by using density functional theory based on reactivity indices and activation energy calculations at the B3LYP/6-31G(d) level of ...
Hossein Eshghi, Amir Khojastehnezhad, Farid Moeinpour, Mehdi Bakavoli   +3 more
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