Hydrogen Bromide → HCID 9955741, compound

This example illustrates a synthesis for compound no. 1552. The synthesis begins with a solution of compound no. 1564 [1-(9,10-dihydroxydecyl-3,7-dimethylxanthine (2.11 g, 6.0 mmol)] from Example 2. Compound no. 1564 was stirred with HBr (5.38 ml, 4.85 g of a 30% solution in acetic acid, 18 mmol) for 90 minutes. The mixture was added to a flask containing saturated aqueous sodium bicarbonate solution (40 ml) and 50 ml of dichloromethane. After 10 minutes of vigorous stirring, the layers were separated and the aqueous layers washed with dichloromethane (2×50 ml). The organic portions were combined, dried with sodium sulfate, and evaporated to give l-(9'-acetoxy-10'-bromodecyl)-3,7-dimethylxanthine as a yellow oil (2.72 g, 100% yield). Without further purification, the oil was taken up in methanol (30 ml), and treated with a solution of sodium methoxide (prepared from 151 mg, 6.6 mmol sodium and 6 ml methanol). After 30 minutes, the reaction mixture was added to water (30 ml) and extracted with dichloromethane (3×50 ml). The organic layers were combined and dried with sodium sulfate to give an off-white solid which was recrystalized (in dichloromethane/petroleum ether) to yield 1-(9,10-oxidodecyl)-3.7-dimethylxanthine racemic mixture.

1. customa synthesis for compound no
2. additionThe mixture was added to a flask
3. customthe layers were separated
4. washthe aqueous layers washed with dichloromethane (2×50 ml)
5. dry with materialdried with sodium sulfate
6. customevaporated

ORD record

ord-994e750aeae546749fa48a22f129e0e4

Source dataset

uspto-grants-1998_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05780476