3.4- bis chloromethyl -2,5-diphenyl

Bis[methoxymethyl]-2,S-diphcnylte1lurophene 430 mg (1 mmol) of 3,4-bis[chloromethyl]-2,5-diphenyl-tellurophene are added to a solution of sodium methoxide prepared from 40 ml of absolute methanol and 200 mg (8.7 mmol) of sodium and the mixture is heated under reflux for 10 h. The mixture is then allowed to cool to 20°, poured into water, and extracted several times with diethyl ether. The combined extracts are dried with anhydrous sodium sulfate, filtered, and the filtrate is evaporated. The residue is chromatographed on silica gel with benzene as the mobile phase to give the product as a light yellow oil yield 350 mg (83%). l,3-Diphenyl-4//,6//-selenophene[3,4-c]tellurophene A solution of disodium selenide, prepared from 1.58 g (20 mmol) of selenium and 0.92 g (40 mmol) of sodium in liquid ammonia, in absolute methanol is saturated with nitrogen. 1.28 g (3 mmol) of 3,4-bis[chloromethyl]-2,5-diphenyltellurophene are added and the mixture is refluxed under nitrogen for 15 h. The mixture is then filtered, the filter cake is dissolved in chloroform in the presence of activated charcoal, filtered, and the product is recrystallized from chloroform/methanol yield 0.79 g (60%) m.p. 220°... 

Figure 7.2 Dependence of equilibrium swelling in toluene on the summarized crosslinking degree for the networks prepared by crosslinking gel-type styrene-DVB copolymers with (1, 2, 4, 5) 1.4-bis(chloromethyl)diphenyl or (3) monochlorodimethyl ether (6) styrene-DVB copolymers. (After [128]).

Figure 16.2 Dependence of the time of saturation of 50% functional groups with (C4H9)4N ions on the resin water uptake for the sulfonates prepared by crosslinking (1-3) linear polystyrene with (1) 1,4-bis(chloromethyl diphenyl), (2) p-xylylene dichloride, and (3) monochlorodimethyl ether (4) styrene-1 % DVB copolymer crosslinked with 1,4-chloromethyl diphenyl (5) sulfonates based on conventional styrene-DVB copolymers numbers denote the degree of crosslinking. (After [371].)...

Pyran-4-one, 2,6-bis(diethylamino)-3,5-diphenyl-conformation, 3, 622 Pyran-4-one, 2-chloromethyl-5-methoxy-benzothiazoles from, 3, 713 Pyran-4-one, 3,5-diacyl-IR spectra, 3, 595 Pyran-4-one, 3,5-dibenzyl-IR spectra, 3, 595... 

Treatment of trans-, 5-bis(p-toluenesulfonyI)-3,7-dihydroxyoctahydro-l, 5-diazocine (135) with thionyl chloride gave rra s-l,4-di(p-toluenesulfonyl)-2,5-di(chloromethyl)piperazine (136) and /ra s-l,4-bis(p-toluenesulfonyl)-6-chloro-2-chloromethylhexahydro-l,4-diazepine (137) (507), and treatment of cis-1,5-diphenyl-3,7-dihydroxyoctahydro-l, 5-diazocine with phosphorus tribromide yielded a mixture of c/s-2,6-bis(bromomethyl)-l, 4-diphenylpiperazine and cis-2,5-bis(bromo-methyl)- , 4-diphenylpiperazine (1670). 

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