Dihydroxy toluene

Dinitro-2,5-dihydroxy toluene, yel-bm prisms + H2O (from w or 50% ale) or yel tablets (from chlf)or om-yel ndls (from benz), mp 149-53° (Ref 1, p877)... 

The reaction mixture from acidified dihydroxyacetone also included a series of seven di- and tri-hydroxybenzenes (see Scheme 4), namely, 2,3-dihydroxytoluene (16), pyrocatechol (17), 3,4-dihydroxy toluene (19), 3,5-dimethyl-l,2-benzenediol (20), 1,2,3-trihydroxybenzene (pyrogallol) (21), 1,2,4-trihydroxy benzene (22), 3,4,5,6-tetrahydroxy-2-methy 1-acetophe-none, and 2,3-dihydroxy-5,6-dimethyl-p-benzoquinone. Many of these same phenolic compounds are present after hexoses are similarly treated... 

N itro-3,4-dihydroxy toluene, golden-yel pltlts (from w) or ndls (from petr eth), mp... 

Nitro-3,4-dihydroxy toluene, lt-yel ndls (from benz or w), mp 180-82° (dec)(Ref 5) 2-Nitro-3,5mdihydroxytoluene, yel ndls + H20 (from w) or bm crysts + Q>H(5(from benz), mp-becomes free of solvents at 122° forms crystalline salts (Ref 6)... 

The total content of RNA + DNA in tissues may be estimated from the phosphorus content or by color reactions of the sugars.37 545 These reactions depend upon dehydration to furfural or deoxyfurfural by concentrated sulfuric acid or HC1 (Eq. 4-4). Furfural formed from RNA reacts with orcinol (3,5-dihydroxy-toluene) and ferric chloride to produce a green color useful in colorimetric estimation of RNA. A similar reaction of DNA with diphenylamine yields a blue color. 

Propylene oxide Benzoic acid, 3,4-dihydroxy- Toluene Benzene, methyl-... 

Dihydroxy toluene (called Dioxy-methyl-benzol or Dioxy-toluol in Ger), CH3.C6H3(0H)2 raw 124.13, O 25.78%. 

Nitro-3,5-dihydroxy toluene, orn-colored ndls (from ale), mp 127° forms salts (Ref 6)... 

Updated Entry replacing H-01352 4-Hydroxybenzenemethanol, 9CI. ol,4-Dihydroxy toluene, p-Hydroxymethylphenol [623-05-2]... 

The formation of colored products by the reaction of sugars and phenols in the presence of strong acids has been mentioned previously as a qualitative test for carbohydrates. Carbazole or anthrone may be used instead of a phenol. Methods employing orcinol (3,5-dihydroxy toluene) and carbazole have been described in detail 31). Dische 32) described a modified carbazole reaction for determining ketohexoses, ketopentoses, trioses, and glycolic aldehyde as well as a method for determining heptoses. 

Preparation by reaction of benzonitrile with 2,6-dihydroxy-toluene in the presence of zinc chloride and hydrochloric acid, followed by hydrolysis of the ketimine hydrochloride so formed with boiling water for 1 h (68%) (Hoesch reaction) [749]. 

Preparation by reaction of benzonihile with 2,4-dihydroxy-toluene in the presence of zinc... 

Also obtained (poor yield) by reaction of acetic anhydride with 3,4-dihydroxy-toluene in the presence of 70% perchloric acid on a steam bath for 3 h (10%) [2722],... 

Anthralin [1143-38-0] is acetylated using acetyl chloride in toluene and a pyridine catalyst to furnish 1,8-dihydroxy-lO-acetylanthrone [3022-61-5], an intermediate in the preparation of medications used in treating skin disorders, such as warts, psoriasis, and acne (38). Sugar esters can be similarly prepared from acetyl chloride under anhydrous conditions (39). 

The enamine (1 g) in 30 ml of benzene and 5 ml of toluene is treated, with cooling, with a solution of 0.33 g (1.04 eq.) of perbenzoic acid in 2.1 ml of benzene. The reaction is complete in a few minutes. Ether (30 ml) is added, then the solution is washed with 2 N sodium hydroxide and with water to neutrality, dried over sodium sulfate and evaporated under reduced pressure. Crystallization from acetone gives 0.51 g of crude product mp 230°. One further crystallization from methanol gives 0.38 g (50%) of 3J5,17a-dihydroxy-5a-pregnan-20-one rap 265°. 

In 1979 the bieyclic diol exo-2,ejco-6-dihydroxy-2,6-dimethylbicyclo[3.3.1]nonane (i) was prepared and observed to co-crystallise with various solvents, including ethyl acetate, chloroform, toluene, dioxane, and acetone. A crystal structure determination of the ethyl acetate compound revealed the occurrence of a helical canal host structure, containing ethyl acetate as guest (with 3 1 diol ethyl acetate stoichiometry), and that spontaneous resolution had occurred on crystallisation of the multimolecular inclusion compound 6>. 

The equilibrium shear modulus of two similar polyurethane elastomers is shown to depend on both the concentration of elastically active chains, vc, and topological interactions between such chains (trapped entanglements). The elastomers were carefully prepared in different ways from the same amounts of toluene-2,4-diisocyanate, a polypropylene oxide) (PPO) triol, a dihydroxy-terminated PPO, and a monohydroxy PPO in small amount. Provided the network junctions do not fluctuate significantly, the modulus of both elastomers can be expressed as c( 1 + ve/vc)RT, the average value of vth>c being 0.61. The quantity vc equals TeG ax/RT, where TeG ax is the contribution of the topological interactions to the modulus. Both vc and Te were calculated from the sol fraction and the initial formulation. Discussed briefly is the dependence of the ultimate tensile properties on extension rate. 

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