2-METHYL-5-PHENYL-3-(3-SULFOPROPYL)BENZOXAZOLIUM HYDROXIDE, INNER SALT synthesis
- Product Name:2-METHYL-5-PHENYL-3-(3-SULFOPROPYL)BENZOXAZOLIUM HYDROXIDE, INNER SALT
- CAS Number:66142-15-2
- Molecular formula:C17H17NO4S
- Molecular Weight:331.39
1120-71-4
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61931-68-8
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66142-15-2
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$28.60/10MG
Yield:66142-15-2 85%
Reaction Conditions:
at 140; for 4 h;
Steps:
1.3
The foregoing benzoxazole [7] in an amount of 52.25 g (0.2 mol) and 45.75 g (0.375 mol) of propane sultone [8] were stirred for 4 hours under heating at 140° C. After cooling, the reaction mixture was admixed with acetone to deposit a crystalline precipitate. The precipitate was filtered off, and washed with acetone to give 70.42 g of the quaternary salt [9] shown above in an 85% yield.
References:
US2005/19711,2005,A1 Location in patent:Page/Page column 62