Dihydroxypropane

Both of these chlorohydrins are converted to 1,2-dihydroxypropane by heating with solutions of sodium hydrogen carbonate when heated with solid sodium hydroxide they give 1,2-epoxypropane. U.S. production 1976 4400 tonnes. 

The general availability of optically pure 3,4-dihydroxybutyric acids has opened up several new routes to chiral 3-carbon fragments with a wealth of functionality. The (S)- and (R)-enantiomers of 3-amino-1,2-dihydroxypropane (15 and 19 respectively) are among the most useful chiral 3-carbon synthons. 

Another method for producing a chiral 3-carbon fragment, this time directly as a protected 5-hydroxymethyl-3-oxazolidin-2-one, is illustrated in scheme 9 (77). In this case, the amide 20 is converted to the 4-trityl ether 24. This undergoes very facile Hofmann rearrangement to give the 5-trityloxymethyl-3-oxazolidin-2-one 26 via the intermediate isocyanate 25. The oxazolidinone 26 is a protected version of 3-amino-1,2-dihydroxypropane. 

In one approach (76) to the use of glucose as a chiral auxiliary for the preparation of optically active 3-carbon synthons, we devised a strategy where the substrate was attached to the auxiliary initially at one point and then subsequently at a second point during the reaction. This is illustrated in scheme 10 where the preparation of both enantiomers of 1,2-dihydroxypropane (29 and... 

Propanediol 1,2-Dihydroxypropane Methyl Glycol CH3CH(OH)CH2OH... 

Dihydroxypropane, 331 4,4 -Diketo-P-carotene, 79 Dilauryl Thiodipropionate, 121 Dill Herb Oil, American Type, 123 Dill Oil, 123... 

SYNS a-CHLORHYDRlN CHLORODEOXY-GLYCEROL 1-CHLORO-2.3-DIHYDROXYPROPANE 3-CHLORO-1.2-DIHYDROXYPROPANE a-CHLOROHYDRIN l-CHLOROPROPANE-2,3-DIOL I-CHLORO-23-PROPANEDIOL 3-CHLOROPROPANE-1,2-DIOL 3-CHLORO-1.2-PROPANEDIOL 3-CHLOROPROPYLENE GYLCOL Q P, 3 -DIHYDROXY-ISOPROPYL CHLORIDE 2,3-DIHYDROXYPROPYL CHLORIDE EPIBLOC GLYCERIN-a-MONOCHLOR-HYDRIN GLYCEROL CHLOROHYDRIN GLYCEROL-a-CHLOROHYDRIN GLYCEROL-a-MONOCHLOROHYDRIN (DOT) GLYCERYL-o-CHLOROHYDRIN MONOCHLORHYDRIN MONOCHLOROHYDRIN a-MONOCHLOROHYDRIN D U-5897... 

DIHYDROXYPROPANE see PMLOOO 17R,21-a-DIHYDROXY-4-PROPYLAJMALANIUM HYDROGEN TARTRATE see DNBOOO DI(2-HYDROXY-n-PROPYL)AMINE see DNB200... 

Dihydroxypropane El520 2-hydroxypropanol methyl ethylene glycol methyl glycol propane-1,2-diol. 

Dihydroxypropane 1,2-Propylene glycol 2-Hydroxypropanol 2,3-Propanediol Propane-... 

Propylene glycol (Figure 12.11), also known as 1,2-propanediol and 1,2-dihydroxypropane, has a molecular weight of 76.1. It is used as an antimicrobial preservative (at 15-30%), a disinfectant, a humectant (at 15%), a solvent or co-solvent, and a stabilizer for vitamins, both in... 

DIHYDROXYPROPANE (57-55-6) Combustible liquid (flash point 210°F/99°C oc). Violent reaction with strong oxidizers, alkalis. Incompatible with sulfuric acid, nitric acid, caustic materials, aliphatic amines, isocyanates, boranes. 

Chloro-2,3-dihydroxypropane 3-Chloro-1,2-dihydroxypropane. See Glyceryl-a-monochlorohydrin... 

The aluminum-chelated alkoxide can also be used unhydrolyzed, in a mixture with prehydrolyzed TEOS [51]. This mixture is concentrated under reduced pressure and the fibers are dry [49] [51] or wet spun [48]. Mullite fibers were prepared from a single phase precursor [52], whereby the alumina source was a viscous solution of aluminum formoacetate. After concentration, the dope was dry spun, yielding fibers which contained orthorhombic mullite after firing at 1250°C. Mullite fibers can also be prepared from another single phase liquid precursor, a mixture of an alkoxysilane, such as tetramethoxysilane or ethyl silicate, and an aluminum chlorohydrate polyol complex, such as the 1,2- dihydroxypropane complex, Al2(0H)5CI-H20-CH3CH(0H)CH20H[46]. 

Synonyms 1,2-propanediol 1,2-dihydroxypropane methylethylene glycol trimethyl glycol 1,2-propylene glycol monopropylene glycol propane-i,2-diol a-propyleneglycol Dowfrost PG 12 Sirlene Solar Winter Ban propanediol... 

Dihydroxypropane Diisobutylene Diisobutylcarbinol Diisobutyl Ketone I. J-Diisocyanatotoluene... 

Poly(acetaldehyde) see Poly(oxyethylidene) Poly[3,3-bis(chloromethyl)oxacyclobutane] see Poly[oxy-2,2 Poly( 1,2-dihydroxypropane)... 

Table 3.1 illustrates a general trend the higher the lipid/water coefficient of a substance, the greater the proportion of it found inside the cell after equilibration has taken place. For example, the insertion of another hydroxyl-group into 1,2-dihydroxypropane, giving glycerol, causes a large... 

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