(2,4-dimethylphenyl)urea

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 12.4 parts of 2,4-xylylurea was suspended in 50 parts of acetonitrile, and 7.7 parts of cumyl chloride and 24 parts of α-methylstyrene were added. With stirring, they were reacted at 40° C. for 6 hours. After allowing the reaction mixture to stand for one day, 50 parts of n-hexane was added. The mixture was further allowed to stand overnight. The precipitated crystals were collected, and recrystallized from 60% methanol to afford 12.5 parts of N-(α,α-dimethylbenzyl)-N'-(2,4,urea (III: R=--C6H3 (CH3)2 --2,4) having a melting point of 163° C. were added they were reacted at 40° C. for 6 hours to stand overnight The precipitated crystals were collected recrystallized from 60% methanol

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 12.4 parts of 2,4 -xylylurea was suspended in 50 parts of nitrobenzene, and 30 parts of α-methylstyrene was added. The mixture was stirred while introducing anhydrous hydrobromic acid portionwise. When the amount of the mixture increased by 10 parts, the introduction of the hydrobromic acid was stopped. The reaction was then performed at 40° C. for 5 hours. The resulting reaction mixture was allowed to stand overnight. Then, 30 parts of n-hexane was added, and the mixture was further allowed to stand overnight. The precipitated crystals were recrystallized from 60% methanol to afford 13.4 parts of N-(α,α-dimethylbenzyl)-N'-(p-tolyl)urea having a melting point of 203° C. was added When the amount of the mixture increased by 10 parts The resulting reaction mixture to stand overnight to stand overnight The precipitated crystals were recrystallized from 60% methanol

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 12.4 parts of 2,4 -xylylurea was suspended in 50 parts of nitrobenzene, and 30 parts of α-methylstyrene was added. The mixture was stirred while introducing anhydrous hydrobromic acid portionwise. When the amount of the mixture increased by 10 parts, the introduction of the hydrobromic acid was stopped. The reaction was then performed at 40° C. for 5 hours. The resulting reaction mixture was allowed to stand overnight. Then, 30 parts of n-hexane was added, and the mixture was further allowed to stand overnight. The precipitated crystals were recrystallized from 60% methanol to afford 13.4 parts of N-(α,α-dimethylbenzyl)-N'-(p-tolyl)urea having a melting point of 203° C. was added When the amount of the mixture increased by 10 parts The resulting reaction mixture to stand overnight to stand overnight The precipitated crystals were recrystallized from 60% methanol

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 12.4 parts of 2,4-xylylurea was suspended in 50 parts of acetonitrile, and 7.7 parts of cumyl chloride and 24 parts of α-methylstyrene were added. With stirring, they were reacted at 40° C. for 6 hours. After allowing the reaction mixture to stand for one day, 50 parts of n-hexane was added. The mixture was further allowed to stand overnight. The precipitated crystals were collected, and recrystallized from 60% methanol to afford 12.5 parts of N-(α,α-dimethylbenzyl)-N'-(2,4,urea (III: R=--C6H3 (CH3)2 --2,4) having a melting point of 163° C. were added they were reacted at 40° C. for 6 hours to stand overnight The precipitated crystals were collected recrystallized from 60% methanol

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 12.4 parts of 2,4 -xylylurea was suspended in 50 parts of nitrobenzene, and 30 parts of α-methylstyrene was added. The mixture was stirred while introducing anhydrous hydrobromic acid portionwise. When the amount of the mixture increased by 10 parts, the introduction of the hydrobromic acid was stopped. The reaction was then performed at 40° C. for 5 hours. The resulting reaction mixture was allowed to stand overnight. Then, 30 parts of n-hexane was added, and the mixture was further allowed to stand overnight. The precipitated crystals were recrystallized from 60% methanol to afford 13.4 parts of N-(α,α-dimethylbenzyl)-N'-(p-tolyl)urea having a melting point of 203° C. was added When the amount of the mixture increased by 10 parts The resulting reaction mixture to stand overnight to stand overnight The precipitated crystals were recrystallized from 60% methanol