5,8-DIHYDROXYPSORALEN synthesis
- Product Name:5,8-DIHYDROXYPSORALEN
- CAS Number:14348-23-3
- Molecular formula:C11H6O5
- Molecular Weight:218.1623
483-36-3
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Yield:14348-23-3 83.3%
Reaction Conditions:
with sulfur dioxide in water; for 0.166667 h;Heating / reflux;
Steps:
46 4,9-Dihydroxy Psoralen (46)
Example 46 4,9-Dihydroxy Psoralen (46) Psoralen quinone 45 (5 grams, 23.2 mmol) was suspended in 1250 mL water and heated on the steam bath. This suspension was saturated with sulfur dioxide by bubbling the gas through the hot liquid for 10 minutes. At the end of this time, all the material had dissolved giving the solution a light green color. Upon cooling, green crystals 46 formed filtered and dried to give pure 46 (4.2 grams, 83.3%). (Ref: J. Org. chem. 1959, 24, 523-526).
References:
US2009/170927,2009,A1 Location in patent:Page/Page column 23-27
298-81-7
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2009-24-7
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2543-94-4
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