91-18-9

Basic information

• Product Name: Pteridine (6CI,7CI,8CI,9CI)
• Synonyms: Pteridine (6CI,7CI,8CI,9CI);pteridine;1,3,5,8-Tetraazanaphthalene;Azinepurine;Inchi=1/C6H4N4/C1-2-9-6-5(8-1)3-7-4-10-6/H1-4;Pteridene
• CAS NO: 91-18-9
• Molecular Formula: C₆H₄N₄
• Molecular Weight: 132.13
• Product Categories: PYRIMIDINE
• Mol File: 91-18-9.mol
• Article Data: 3

Chemical Properties

• Melting Point: 138-138.5°
• Boiling Point: 234.02°C (rough estimate)
• Flash Point: 124.7°C
• Appearance: /
• Density: 1.3363 (rough estimate)
• Vapor Pressure: 0.0154mmHg at 25°C
• Refractive Index: 1.7000 (estimate)
• PKA: 4.05(at 20℃)
• Water Solubility: 122g/L(22.5 oC)
• CAS DataBase Reference: Pteridine (6CI,7CI,8CI,9CI)(CAS DataBase Reference)
• NIST Chemistry Reference: Pteridine (6CI,7CI,8CI,9CI)(91-18-9)
• EPA Substance Registry System: Pteridine (6CI,7CI,8CI,9CI)(91-18-9)

Safety Data

• Hazardous Substances Data: 91-18-9(Hazardous Substances Data)

Usage

Purification Methods

It crystallises from EtOH, *benzene, n-hexane, n-heptane or pet ether. It is best purified by sublimation at 120-130o/20mm. Store at 0o, in the dark. It turns green in the presence of light and on long standing in the dark and sublimation leaves the dark-coloured material behind. [Albert et al. J Chem Soc 474 1951; see Albert & Armarego Adv Heterocycl Chem 4 1 1965, Beilstein 26 III/IV 1770.]

InChI:InChI=1/C6H4N4/c1-2-9-6-5(8-1)3-7-4-10-6/h1-4H

Upstream product

• 14130-90-6 4-Hydroxy-3,4-dihydro-pteridin 
• 14130-91-7 5,6,7,8-tetrahydro-pteridine-6,7-diol 
• 5049-61-6 2-Aminopyrazine 
• 77287-34-4 formamide 
• 513-88-2 1,1-Dichloroacetone 
• 5392-28-9 2,4,5,6-tetraaminopyrimidine sulfate 
• 13754-19-3 4,5-pyrimidinediamine 
• 64-17-5 ethanol 
• 85649-64-5 C₆H₄⁽²⁾H₂N₄O 

Downstream Products

• 700-47-0 pteridin-4-one 
• 343269-86-3 tetrahydropteridine 
• 14130-90-6 4-Hydroxy-3,4-dihydro-pteridin 
• 14130-91-7 5,6,7,8-tetrahydro-pteridine-6,7-diol 
• 6973-01-9 4-aminopteridine 
• 50533-51-2 7-methyl-5,5a,8a,9-tetrahydro-furo[2,3-g]pteridine-8-carboxylic acid benzyl ester 

Relevant articles and documents

Evaluation of electrophilic heteroaromatic substitution: Synthesis of heteroaromatic-fused pyrimidine derivatives via sequential three-component heterocyclization

A new sequential three-component heterocyclization was developed by reacting aromatic and heterocyclic substrates, including aminobenzenes, 1-aminonaphthalene, 2-aminopyrazines, 5-aminopyrazoles, 3-aminopyridine, 5-aminopyrimidine, 5-aminoquinoline, and 8

Process for the production of methotrexate

Process for the production of methotrexate, which is N[p-([(2,4-diamino-6-pteridyl)-methyl]-N10 -methylamino)-benzoyl]-L-glutamic acid. The process includes converting 1,1-dichloroacetone with 2,4,5,6-tetraaminopyrimidine in the presence of sodium bisulfite at a constant pH between 3.5 and 5 and at a temperature between 10° and 100° C. The resultant 2,4-diamino-6-methylpteridine is converted in a reaction medium with bromide. 0.3 to 1.0 ml of bromine is used per 1.0 g of the 2,4-diamino-6-methylpteridine. The 2,4-diamino-6-bromo methyl pteridine is converted with p-(N-methyl)-aminobenzoyl-L-glutamic acid or a salt thereof in a polar reaction medium into methoxtrexate.