Synthesis of Orthogonally Protected Actinoidic Acid Trimethyl Ether

On treatment with m-chloroperbenzoic acid, dihydroeugenol methyl ether and marchantin A trimethyl ether afford muconic acid ester derivatives by oxidation of the aromatic ring as well as hydroxylated derivatives; the m-chlorobenzoate of the dihydroeugenol derivative is also observed for the former.

Download Full-text

Dimerization of resveratrol trimethyl ether by phosphotungstic acid, structure confirmation of resformicol A and B

Tetrahedron Letters ◽

10.1016/j.tetlet.2012.04.132 ◽

2012 ◽

Vol 53 (27) ◽

pp. 3521-3523 ◽

Cited By ~ 5

Author(s):

Matthew C. Davis ◽

Thomas J. Groshens

Keyword(s):

Phosphotungstic Acid ◽

Trimethyl Ether ◽

Structure Confirmation ◽

Acid Structure

Download Full-text

ChemInform Abstract: Catalytic Activity of Diethylene Glycol Dimethyl Ethers in Conversion of 6,7-Dichloro-3-ethyl-2-ethoxynaphthazarine into Echinochrome Trimethyl Ether.

ChemInform ◽

10.1002/chin.200245090 ◽

2010 ◽

Vol 33 (45) ◽

pp. no-no

Author(s):

T. Yu. Kochergina ◽

V. F. Anufriev

Keyword(s):

Catalytic Activity ◽

Diethylene Glycol ◽

Trimethyl Ether

Download Full-text

New Erythroxane-Type Diterpenoids from Fagonia boveana (Hadidi) Hadidi & Graf

Zeitschrift für Naturforschung C ◽

10.1515/znc-2003-1-204 ◽

2003 ◽

Vol 58 (1-2) ◽

pp. 23-32 ◽

Cited By ~ 8

Author(s):

Sahar R. Gedara ◽

Osama B. Abdel-Halim ◽

Saleh H. El-Sharkawy ◽

Osama M. Salama ◽

Thomas W. Shier ◽

...

Keyword(s):

Herpes Simplex ◽

Protein Tyrosine Kinase ◽

Biological Activities ◽

Aerial Parts ◽

Sesquiterpene Alcohol ◽

Trimethyl Ether ◽

Chemical Correlation ◽

Physical And Chemical ◽

Active Cancer

The aerial parts of Fagonia boveana afforded two new erythroxane-type diterpenes, 3β, 15, 16-trihydroxy-erythrox-4(18)-ene (2) and 15, 16-dihydroxy-cis-ent-erythrox-3-ene (fagonene) (3) together with two known ones; 16-O-acetylfagonone (1) and 7β-hydroxy fagonene (8). Also a new guaiane sesquiterpene alcohol, 6,10-epoxy-4α-hydroxy guaiane type sesquiterpene (4) has been isolated In addition three 8-methoxy flavonols, 8-methoxy-quercetin-3, 7, 3′-trimethyl ether (ternatin) (5), gossypetin, 3, 8, 3′, 4′ tetramethyl ether (6) and herbacetin- 3, 8-dimethyl ether (7) were also isolated. The structures of the isolated compounds have been determined on the basis of spectroscopic evidences as well as physical and chemical correlation with known compounds. On performing different assays for biological activities, 6 displayed significant cytotoxic activity against KA3IT and NIH3T3 cell lines, 8 was the most active antiviral against Herpes simplex type 1 while 7 was the most active cancer-preventive agent using protein-tyrosine kinase inhibitory method

Download Full-text

Studies on the formation of complex oxidation and condensation products of phenols. Part III. -Rearrangements of oxidation-reduction type in the diquinone group

Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character ◽

10.1098/rspa.1933.0214 ◽

1933 ◽

Vol 143 (848) ◽

pp. 223-228 ◽

Cited By ~ 8

Keyword(s):

Hydroxyl Group ◽

Hydrogen Atoms ◽

Blue Colour ◽

Highly Active ◽

Oxidation Reduction ◽

Intramolecular Reactions ◽

Trimethyl Ether ◽

Free Hydroxyl ◽

Ethereal Oxygen ◽

Complex Oxidation

The diquinones have been but little investigated, and as they contain two condensed highly active quinonid systems it is to be anticipated that they should be capable of interesting intramolecular reactions. When heated to 210-215º, 4 : 4'-dimethoxydiquinone is rapidly converted into a red crystalline isomeride (yield, 90%), soluble in alkali with an intense blue colour, and yielding a mono-acetate indicating the occurrence of a free hydroxyl group. Two hydrogen atoms are taken up on reduction, and the phenolic product yields a triacetate and a trimethyl ether. It follows that of the four carbonyl oxygens of 4 : 4'-dimethoxydiquinone, one has been converted into a hydroxyl group, and another which does not exhibit any functional activity, is probably present as ethereal oxygen. These results led to formula (III) as representing the product of rearrangement.

Download Full-text