1.5- Diphenyl-1,3-pentanediol

On the other hand, Davies5 , studying the reaction of adipic add with 1,5-pentanediol in diphenyl oxide or diethylaniline found an order increasing slowly from two with conversion. From this result he concluded that Flory s1,252-254> and Hinshelwood s240,241 interpretations are erroneous. Two remarks must be made about the works of Davies5 experimental errors relative to titrations are rather high and kinetic laws are established for conversions below 50%. Under such conditions the accuracy of experimental determinations of orders is rather poor. 

Hydrogenation of ethyl 2,4-dioxopentanoate with an (S)-MeO-BIPHEP-Ru complex followed by in situ cyclization gives (3R,5S)-3-hydroxy-5-methyltetrahydrofuran-2-one with 98% ee and the 3R,5R isomer with 87% ee in an 84 16 ratio [236]. Ethyl 2-hydroxy-4-oxopentanoate is the only detectable intermediate. 1,3-Diphenyl-l,3-propanediol with a BIPHEMP-Ru complex is transformed to an anti-diol selectively [237]. 1,5-Dichloro-2,4-pentanediol, a versatile chiral building block, is selectively obtained through the BINAP-Ru catalyzed hydrogenation of a... 

All other reported routes to the 1,3-dioxocin ring system involve condensation of an appropriate one-carbon dielectrophile with 1,5-diols. A low (21%) yield of the 2,2-diphenyl derivative (66) is obtained, together with comparable amounts of a cyclic dimer and an acyclic 2 1 adduct, as well as traces of an apparent cyclic trimer, upon treatment of pentanediol with a reagent prepared in situ from diphenyldiazomethane and DDQ (Scheme 29) <84JOC4060>. 

Dimethylaminomethyl phenol Diphenyididecyl (2,2,4-trimethyl-1,3-pentanediol) dIphosphite Diphenyl isodecyl phosphite Distearyl dithiodipropionate Ethyl hydroxymethyl oleyl oxazoline... 

Dipropylene glycol dibenzoate, isodecyl diphenyl phosphate, dibutyl phthalate, and 2,2,4-trimethyl-l,3-pentanediol monoisobutyrate have been used in a stripable film coating composition. 

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