1.4- Dihydroxy-2-methylbenzene

C7H802 1,2-dihydroxy-4-methylbenzene 452-86-8 531.15 52.387 1,2 10972 C7H9NO 2-amino-3-methyl phenol 2835-97-4 480.51 42.014 2... 

The earliest reported demonstration of enzymatic activity in a supercritical fluid was for the reaction of disodium p-nitrophenyl phosphate to p-nitro-phenol, catalysed by alkaline phosphatase. Randolph et aL [26] detected the product in yields of up to 71% in carbon dioxide at 35°C and 100 atm, in the presence of 0.1% v/v water. Hammond et al. [33] found tyrosinase, a polyphenol oxidase, to be catalytically active for the oxidation of 4-methyl phenol in both supercritical carbon dioxide at (36 2)°C and supercritical trifluoro-methane at (34 2)°C, with oxygen, at a total pressure of 345 bar. Use of a flow reactor permitted isolation of greater quantities of the catecholic product (1,2-dihydroxy, 4-methylbenzene). Oxidative activity for 4-chlorophenol substrate was appreciably lower. 

Fluorescence was observed for the TMB family such as 3,5-dimethoxyphenol, l,3-dihydroxy-5-methoxybenzene (5-methoxyresorcinol), l-acetoxy-3,5-dimethoxyben-zene, and l,3,5-trimethoxy-2-methylbenzene. These results indicated that complete symmetry of the substitution on O atoms is not necessary to observe fluorescence from the TMB family, and that the variation of parent molecules of fluorescent radical cation is possibly performed [153]. Fluorescence was also detected from hexamethxybenzene as an example of pseudo-Dgh molecules. The discussion of the symmetry has been described here on the fluorescence from fluorobenzenes in the vapor-phase or noble gas matrices. 

SYNS l,3-DIHYDROXY-5-METHYLBENZENE 3,5-DIHYDROXYTOLUENE 5-METHYL-l,3-BENZENDI-OL 5-METHYLRESORCINOL ORCINOL ORCIN ORCINOL... 

DI(HYDROXYMETHYL)ANnNO-6-(5-NITRO-2-FURYLETHENYL)-1,2,4-TRIAZINE see BKH500 3-DI(HTOROXYA4ETHYL)AMINO-6-(2-(5-NITRO-2-FURYL) aNYL)-l,2,4-TRIAZINE see BKH500 L3-DIHYDROXY-5-METHYLBENZENE see MPH500... 

For mercnration of p-xyienol, inonobromo-p-xylenol, 2 3-dihydroxy-1 -methylbenzene and pyrogaliol-1 3-diethyl ether, see German Patent, 250746,... 

Higher plant resorcinolic lipids include very simple homologues of the orcino 1-type (l,3-dihydroxy-5-methylbenzene) phenols and a variety of homologues that are derivatives with the ring, chain or both ring and chain modified. Resorcinolic lipid molecules have a dual, aromatic and acyclic character. In most cases the side chain in resorcinolic lipids is odd numbered, which is relevant with regard to their possible biosynthetic pathway. 

FAB and MALDI mass spectrometric analyses of both polymers reveals that only macromolecules having hydroxy end-groups are formed by this interesting synthetic procedure. Figure 7.10 reports the FAB spectrum of the oligomers present in the unfractionated poly(l,2-dihydroxy-4-methylbenzene phthalate). Remarkably, the spectrum shows peaks up to m/z values of 6000,... 

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