反应 #88447

反应方程式

4-chlorobenzaldehyde

3-(3-(tert-butyldimethylsilyloxy)propyl)-6-(3-chlorophenoxy)-1-methyl pyrido[3,4-d]pyrimidine-2,4(1H,3H)-dione

LDA

→

3-(3-(tert-butyldimethylsilyloxy)propyl)-6-(3-chlorophenoxy)-5-((4-chlorophenyl)(hydroxy)methyl)-1-methylpyrido[3,4-d]pyrimidine-2,4(1H,3H)-dione

收率 29.0%

溶剂

THF

THF

反应条件

后处理

1. 1
   workup.STIRRINGThe reaction was stirred at −78° C. for 30 min
2. 2
   其他quenched with aq. NH4Cl (3 mL)
3. 3
   干燥The organic layer was dried over Na2SO4
4. 4
   浓缩concentrated to a residue which
5. 5
   其他was purified by chromatography PE/EA (2:1)

实验过程

To a solution of 3-(3-(tert-butyldimethylsilyloxy)propyl)-6-(3-chlorophenoxy)-1-methyl pyrido[3,4-d]pyrimidine-2,4(1H,3H)-dione (150 mg, 0.315 mmol) in THF (4 mL) at −78° C. was added LDA (2.0 M in THF, 0.79 mL, 1.58 mmol) dropwise. The reaction was stirred at −78° C. for 1 h then a solution of 4-chlorobenzaldehyde (88 mg, 0.625 mmol) in THF (1 mL) was added. The reaction was stirred at −78° C. for 30 min, quenched with aq. NH4Cl (3 mL) then diluted EA (20 mL) and water (20 mL). The organic layer was dried over Na2SO4 and concentrated to a residue which was purified by chromatography PE/EA (2:1) to give 3-(3-(tert-butyldimethylsilyloxy)propyl)-6-(3-chlorophenoxy)-5-((4-chlorophenyl)(hydroxy)methyl)-1-methylpyrido[3,4-d]pyrimidine-2,4(1H,3H)-dione (56 mg, 29% yield) as a solid. LCMS: (M+-OH) 598 and TR=2.221 min.

来源