反応 #1747859

反応方程式

methanol

potassium tert-butoxide

10-methylphenothiazine-3,7-dicarbaldehyde

diethyl benzhydrylphosphonate

→

3,7-Bis(2,2-diphenylvinyl)-10-methylphenothiazine

溶媒

dimethyl sulfoxide

反応条件

後処理

1. 1
   その他prepared analogously to Example 13 in U.S
2. 2
   その他rose from 25 to 43° C
3. 3
   workup.STIRRINGstirred for 15 min
4. 4
   ろ過filtered through a black band
5. 5
   ろ過filter
6. 6
   洗浄The residue was washed with 300 ml of methanol
7. 7
   その他dried at 80° C. under reduced pressure
8. 8
   workup.DISSOLUTIONThe crude product (4.7 g) was dissolved in 150 ml of methylene chloride
9. 9
   その他purified on silica gel
10. 10
    その他recrystallized from 83 ml of butylglycol
11. 11
    その他were obtained

実験手順

3.46 g (30.4 mmol) of potassium tert-butoxide and then 3.60 g (13.4 mmol) of 10-methylphenothiazine-3,7-dicarbaldehyde were added with stirring and at room temperature to a solution of 8.20 g (26.8 mmol) of diethyl benzhydrylphosphonate (prepared analogously to Example 13 in U.S. Pat. No. 5,130,603) in 60 ml of anhydrous dimethyl sulfoxide, in the course of which the temperature rose from 25 to 43° C. After stirring at room temperature for 5 hours, the reaction solution was admixed with 150 ml of methanol, stirred for 15 min and filtered through a black band filter. The residue was washed with 300 ml of methanol and dried at 80° C. under reduced pressure. The crude product (4.7 g) was dissolved in 150 ml of methylene chloride, purified on silica gel and recrystallized from 83 ml of butylglycol. 3.56 g (23% of theory) of greenish microcrystals having a melting point of 233-241° C. were obtained.

出典