1-Methoxy-2-propanol → p-Toluenesulfonic acid

HRID 1905349Notes

Reaction equation

HRID 1905349 reaction equation
COCC(O)C.CC(=O)CC(C)(O)C.C=CC1C=CC=CC=1.C(O)(=O)/C=C\C(O)=O.[C:31]1(C)[CH:36]=[C:35]([CH3:37])[CH:34]=[C:33](C)[C:32]=1[S:39]([O-:42])(=[O:41])=[O:40]>C(C(C)=O)C>[C:35]1([CH3:37])[CH:36]=[CH:31][C:32]([S:39]([OH:42])(=[O:40])=[O:41])=[CH:33][CH:34]=1

Participants

6

Reactant 4

HCID 79001-Methoxy-2-propanolHCID 31256Diacetone AlcoholHCID 38762462,4,6-Trimethylbenzene-1-sulfonateHCID 64408772-Butenedioic acid (Z)-, disodium salt, polymer with ethenylbenzene

Product 1

HCID 6101p-Toluenesulfonic acid

Reagents, catalysts & solvents 1

HCID 6569Methyl Ethyl KetoneSolvent

Procedure

A light-sensitive composition is prepared by blending together 210 g of methyl ethyl ketone, 94.5 g of propylene glycol mono methyl ether and 140 g of diacetone alcohol under moderate stirring and then adding 21 g of Scripset 540, a styrene/maleic acid half ester copolymer having an average molecular weight from about 10,000 to 50,000 available from Monsanto, and stirring until the copolymer is dissolved. 1.75 g of p-toluene sulfonic acid and 10.5 g of the condensation product of 3-methoxy-4-diazo diphenyl amine sulfate and 4,4'-bis-methoxy methyl diphenyl ether isolated as the mesitylene sulfonate are then added while under continued stirring. In a separate vessel, 122.5 g of a white dispersion (50% solids in propylene glycol mono methyl ether) and 42 g of a black dispersion (25% solids in methyl ethyl ketone) are blended. The first mixture is then added to the dispersion blend and the entire formulation is stirred for thirty minutes to insure complete mixing.

Workup

  1. customA light-sensitive composition is prepared
  2. additionadding 21 g of Scripset 540
  3. stirringstirring until the copolymer
  4. dissolutionis dissolved

Sources & evidence

ORD record
ord-8c75346aae5943589a6541459f240493
Source dataset
uspto-grants-1989_06
Patent number
US04842950

Reaction notes

Loading…