92-70-6 Usage
Description
3-Hydroxy-2-naphthoic acid is an organic compound that serves as a key intermediate in the synthesis of various dyes, pigments, insecticides, and pharmaceuticals. It is known for its high degree of color stability, resistance to acids and alkalies, and non-toxic nature.
Uses
Used in Dye and Pigment Industry:
3-Hydroxy-2-naphthoic acid is used as an intermediate for the production of dyes and pigments, contributing to their color stability and resistance to various environmental factors.
Used in Insecticide Production:
3-Hydroxy-2-naphthoic acid serves as an intermediate in the synthesis of insecticides, playing a crucial role in the development of effective pest control agents.
Used in Pharmaceutical Industry:
3-Hydroxy-2-naphthoic acid is utilized as an intermediate in the production of pharmaceuticals, aiding in the creation of various medicinal compounds.
Used in Coupling with Diazo Compounds:
2-hydroxy-3-naphthoic acid (BON) is coupled with diazo compounds, and their calcium salts produce bright red bleed resistance pigments. The manganese salt, although more expensive, offers better exterior durability compared to calcium or barium salts. The BON red pigments are characterized by their exceptional color stability, resistance to acids and alkalies, and non-toxic properties.
Purification Methods
Crystallise it from water or acetic acid. The S-benzyisothiuronium salt has m 216-217o (from EtOH). It forms many metal complex salts. [Beilstein 10 H 333, 10 III 1084.]
Check Digit Verification of cas no
The CAS Registry Mumber 92-70-6 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 9 and 2 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 92-70:
(4*9)+(3*2)+(2*7)+(1*0)=56
56 % 10 = 6
So 92-70-6 is a valid CAS Registry Number.
InChI:InChI=1/C11H8O3/c12-10-6-8-4-2-1-3-7(8)5-9(10)11(13)14/h1-6,12H,(H,13,14)/p-1
92-70-6Relevant articles and documents
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Karpuchin,Chusid
, p. 375,382 (1935)
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Synthesis of Polysubstituted 2-Naphthols by Palladium-Catalyzed Intramolecular Arylation/Aromatization Cascade
Cai, Jinhui,Hu, Xu-Dong,Liu, Wen-Bo,Wang, Zhen-Kai,Yao, Fei,Zhang, Yun-Hao
supporting information, (2020/02/25)
A palladium-catalyzed intramolecular α-arylation and defluorinative aromatization strategy for the synthesis of polysubstituted 2-naphthols is reported. With ortho-bromobenzyl-substituted α-fluoroketones as the substrates and palladium acetate/triphenylphosphine as the catalyst, this method features good functional group tolerance, readily available catalyst and starting materials, and high yields. The applications of the strategy are demonstrated by the synthesis of useful building blocks, such as naphtha[2,3-b]furan, naphthol AS-D, and ligands/catalysts. (Figure presented.).
A versatile approach for the synthesis of para -substituted arenes via palladium-catalyzed C-H functionalization and protodecarboxylation of benzoic acids
Pan, Shulei,Zhou, Bo,Zhang, Yanghui,Shao, Changdong,Shi, Guangfa
supporting information, p. 277 - 281 (2016/01/20)
While a great number of ortho C-H functionalization reactions have been developed and several breakthroughs have been achieved in meta C-H activation, para C-H functionalization is still in its infancy stage. In this article, a versatile strategy for the synthesis of para-substituted arenes has been developed via a tandem process consisting of palladium-catalyzed C-H functionalization and subsequent copper-catalyzed protodecarboxylation of benzoic acids. Both electron-withdrawing and electron-donating functionalities can be introduced into the para positions of arenes bearing a variety of substituents.