1: bis-diphenylphosphine With n-butyllithium in tetrahydrofuran; hexane T=-40 - 0°C; Metallation; 2: 1,3-bis(chloromethyl)-2,4,6-trimethylbenzene in tetrahydrofuran; hexane T=20°C; Condensation; Heating; Further stages.;
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2,2'-azo-bisisobutyronitrile T=80°C; 46 h; Yield given. Yields of byproduct given. Title compound not separated from byproducts;
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potassium hydroxide in dimethyl sulfoxide Heating;
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in benzene soln. of aldehyde and B-compd. addn. to P-compds., 3 h; solvent removing in vacuum, recrystn. (acetonitrile), crystals filtration off, washing (acetonitrile), products not separated, characterization by IR and NMR spectroscopies;
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