TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (claimed): Preparation of (I) involves subjecting the aldehyde compound (II) to a reduction reaction in the presence of a reducing agent. SPECIFIC COMPOUNDS - 6 Compounds are disclosed as (I) e.g. (4-((4-(4-(bis-(4-hydroxymethyl-phenyl)-amino)-benzyl)-phenyl)-(4-hydroxymethyl-phenyl)-amino)-phenyl)-methanol (Ia); (4-((4-(4-(bis-(4-hydroxymethyl-phenyl)-amino)-phenoxy)-phenyl)-(4-hydroxymethyl-phenyl)-amino)-phenyl)-methanol; (4-((4-((E)-2-(4-(bis-(4-hydroxymethyl-phenyl)-amino)-phenyl)-vinyl)-phenyl)-(4-hydroxymethyl-phenyl)-amino)-phenyl)-methanol; (4-((4-(2-(4-(bis-(4-hydroxymethyl-phenyl)-amino)-phenyl)-ethyl)-phenyl)-(4-hydroxymethyl-phenyl)-amino)-phenyl)-methanol; and (4-((4-(3-(bis-(4-hydroxymethyl-phenyl)-amino)-phenoxy)-phenyl)-(4-hydroxymethyl-phenyl)-amino)-phenyl)-methanol.    EXAMPLE - 4,4'-Diaminodiphenyl methane (19.83 g), bromobenzene (69.08 g), palladium acetate (2.24 g), sodium tert-butoxide (46.13 g) and ortho-xylene (250 ml) were mixed by an agitator at room temperature under an argon gas flow. Next, tri-t-butyl phosphine (8.09 g) was dropped into the flask while agitating. After the mixture was heated to 80 degrees C while agitated, the mixture was further agitated for 1 hour while refluxed. Further, the mixture was diluted with toluene, and magnesium sulfate, activated earth, and silica gel were added to the reaction product, followed by filtering, washing and condensing, resulting in preparation of a crystalline material. The crystalline material was dispersed in methanol, followed by filtering, washing and drying. Thus, a pale yellow powder (45.73 g) was prepared. The pale yellow powder prepared above (30.16 g), N-methylformanilide (71.36 g) and ortho-dichlorobenzene (400 ml) were mixed by an agitator at room temperature under an argon gas flow. Next, phosphorus oxychloride (82.01 g) was dropped into the flask. After the mixture was heated to 80 degrees C while agitated, zinc chloride (32.71 g) was dropped, and the mixture was agitated for about 10 hours at 80 degrees C, followed by agitating at 120 degrees C. Next, an aqueous solution of potassium hydroxide was added to perform a hydrolysis reaction. The reaction product was extracted using dichloromethane, and the extracted material was subjected to a dehydration treatment using magnesium sulfate, followed by an absorption treatment using activated earth, filtering, washing and condensing, resulting in preparation of a crystalline material. The crystalline material was subjected to a refining treatment to be isolated using a silica gel column and a mixture solvent of toluene and ethyl acetate mixed at a weight ratio of 8/2. The thus-prepared crystalline material was subjected to a re-crystallization treatment using a mixture solvent of methanol and ethyl acetate. Thus, a yellow powder (27.80 g) was prepared. The yellow powder prepared above (12.30 g) and ethanol (150 ml) were mixed by an agitator at room temperature. Next, sodium borohydride (3.63 g) was added, and the mixture was agitated for 4 hours. The reaction product was extracted using ethyl acetate, and the extracted material was subjected to a dehydration treatment using magnesium sulfate, followed by an absorption treatment using activated earth and silica gel, filtering, washing and condensing, resulting in preparation of an amorphous material. The amorphous material was dispersed in n-hexane, followed by filtering, washing and drying. Thus, (4-((4-(4-(bis-(4-hydroxymethyl-phenyl)-amino)-benzyl)-phenyl)-(4-hydroxymethyl-phenyl)-amino)-phenyl)-methanol was obtained as a pale yellowish white amorphous material (12.0 g).