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ChemicalBook CAS DataBase List 7-bromo-4-chloro-5H-pyrrolo[3,2-d]pyrimidine
1032650-41-1

7-bromo-4-chloro-5H-pyrrolo[3,2-d]pyrimidine synthesis

5synthesis methods
93587-23-6 Synthesis
7-BROMO-1,5-DIHYDRO-4H-PYRROLO[3,2-D]PYRIMIDIN-4-ONE

93587-23-6
53 suppliers
$65.00/50mg

-

Yield: 93%

Reaction Conditions:

Stage #1:7-bromo-3,5-dihydropyrrolo[3,2-d]pyrimidin-4-one with trichlorophosphate at 115; for 3 h;
Stage #2: with potassium carbonate in water at 0 - 20;

Steps:

49
A mixture of 7-bromo-3,5-dihydropyrrolo[3,2-?]pyrimidin-4-one (100 mg, 0.5 mmol) and 6 mL of POCI3 under argon was warmed at 115°C. After 3 hours, the mixture was cooled to room temperature and poured over 300 mL of ice, stirred, made basic with potassium carbonate and extracted with EtOAc. The combined organic layers were dried, filtered, and concentrated in vacuo to provide 101 mg (93%) of the desired 7-bromo-4-chloro-5H-pyrrolo[3,2- djpyrimidine as beige solid which was used without further purification.

References:

Location in patent:Page/Page column 153

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