New PDF release: A Further Note on the Age Index of a Population

By LaBlanc T. J., Pearl R.

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P. 164-165° [31], 154° [174]; 1 HNMRPILIRPI]. wt. 70 Synthesis -Refer to: [627, 1013] (Japanese patents). p. and Spectra (NA). wt. 24 Syntheses -Obtained by hydrolysis of 4-acetamido-2-hydroxybenzophenone, *with boiling 5 N hydrochloric acid [658]; *with refluxing 48% hydrobromic acid [1307]. -Preparation by hydrolysis of 4-benzamido-2-hydroxybenzophenone (SM) with concentrated hydrochloric acid in refluxing acetic acid for 16 h (61%). p. 155°) [174]. -Also refer to: [1135]. p. 127-128° [1307], 125° [174, 658]; Spectra (NA).

22 Synthesis -Preparation by reaction of gallic acid with pyrocatechol in chlorobenzene in the presence of methanesulfonic acid for 6 h between 65 to 75° (90%) or by using boron trifluorideetherate instead of methanesulfonic acid as catalyst (10%). -Refer to: Chem. , 108, 204327v (1988). p. and Spectra (NA). 5 h (65%) [507]; *in the presence of zinc chloride and a mixture of polyphosphoric acid/85% phosphoric acid (60:40) at 27°. Then, during 2 h, phosphorous trichloride was added between 27 to 37° and the mixture heated at 60° for 16 h [1302].

P. 84-85° [693]; Spectra (NA). Phenyl(3,5,6-trifluoro-2-hydroxy-4-methoxyphenyl)methanone [32541-21-2] C14H9F3O3 moLwt. 22 Synthesis -Preparation by partial demethylation of 2,4-dimethoxy3,5,6-trifluorobenzophenone in methylene chloride in the presence of aluminium chloride at 20° for 3-6 h (94%) [839]. p. 56-58° [839]; 1 H NMR [839], IR [839], UV [839]. wt. 14 -Preparation by saponification of 2-(benzoyloxy)-6-bromo5-methoxy-4-nitrobenzophenone (SM) with potassium hydroxide in ethanol (71%). SM was obtained by oxidation of 4-bromo-5-methoxy-6-nitro-2,3-diphenylbenzofuran with chromium trioxide in boiling acetic acid for 30 min [574].

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A Further Note on the Age Index of a Population by LaBlanc T. J., Pearl R.


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