Process for aryl-quinone and aryl-naphthoquinone diazide sulfonic acids
A process for the preparation of aryl-diazide-sulfonic acids by a series of sequential in-situ process steps. The process comprises the nitrosation of a hydroxyarylsulfonic acid; conversion of the nitroso-derivative to a sulfamate which is then diazotized to the diazide. Temperature and pH are maintained in predetermined ranges to maintain the reaction products in solution without the formation side-products or the need to isolate intermediates. The process of the invention is particularly useful in the preparation of light-sensitive materials such as naphthoquinonediazide sulfonic acids which are used in the preparation of photoresist compositions. The invention provides a high purity product at a high material efficiency, high equipment utilization, low effluent discharge, and reduced cost.
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(2008/06/13)
MATHEMATICAL MODELLING OF THE KINETICS OF THE HETEROGENEOUS SULFONATION OF 2-NAPHTHOL WITH SULFURIC ACID
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Radyshevskaya, O. N.,Gordeev, L. S.,Darmanyan, A. P.,Tyabin, N. V.
p. 1412 - 1416
(2007/10/02)
Excited-State Proton-Transfer Kinetics: A Theoretical Model
The intersecting-state model is applied to excited state proton-transfer reactions.The results are consistent with those previously obtained for the analogous ground-state reactions.The transition-state bond order n* is similar in the ground and excited states: carbon acids have lower n* than nitrogen or oxygen acids.The mixing entropy parameter λ is found to be lower for excited-state than ground-state reactions.The mechanistic implications of this are discussed.
Arnaut, Luis G.,Formosinho, Sebastiao J.
p. 685 - 691
(2007/10/02)
Aromatic azo sulfonylnitrene compounds
Compounds of the structure SPC1 Wherein R and R1 are the same or different and are selected from the group consisting of hydrogen, halogen, and alkyl from one to four carbon atoms, inclusive, and R2 is a substance which inhibits thrombogenic or clotting activity of a material and is that portion of a substituted aromatic which couples with a diazonium salt.