Sulfuric Acid → HCID 19083679, compound
Reaction equation
C([O:5][C:6]1[CH:13]=[CH:12][C:9]([CH:10]=[CH2:11])=[CH:8][CH:7]=1)(C)(C)C.[CH2:14]=[CH:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1.COCC(O)C.N(C(C)(C)C#N)=NC(C)(C)C#N.S(=O)(=O)(O)O.OC=CC1C=CC=CC=1>C(OCC)(=O)C>[OH:5][C:6]1[CH:13]=[CH:12][C:9]([CH:10]=[CH2:11])=[CH:8][CH:7]=1.[CH2:14]=[CH:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1Participants
Procedure
A solution was prepared by dissolving 100 parts by weight, as the total amount, of p-t-butoxystyrene and styrene (molar ratio was p-t-butoxystyrene:styrene=80:20) in 150 parts by weight of propylene glycol monomethyl ether. This solution was kept under a nitrogen atmosphere at 70° C. for 10 hr with 4 parts by weight of azobisisobutyronitrile supplied to proceed polymerization. Then, sulfuric acid was added to the reaction solution, and the resultant solution was kept at 90° C. for 10 hr to covert the p-t-butoxystyrene unit into a hydroxystyrene unit through deprotection. Ethyl acetate was added to the obtained copolymer, the resultant solution was washed with water 5 times, the ethyl acetate phase was collected, and the solvent was removed to obtain p-hydroxystyrene/styrene copolymer (hereinafter, referred as “alkali soluble resin (A-1)”).
Workup
- customA solution was prepared
- dissolutionby dissolving 100 parts by weight
- custompolymerization
- washthe resultant solution was washed with water 5 times
- customthe ethyl acetate phase was collected
- customthe solvent was removed
Sources & evidence
- ORD record
- ord-b0b0b76442ad4b05b3d8cde5fcbb7f29
- Source dataset
- uspto-grants-2008_02
- Patent number
- US07332254B2
Reaction notes
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