Chinese Japanese Germany Korea
ChemicalBook >> CAS DataBase List >>3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one

3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one

3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one Structure
3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one structure
CAS No.
5439-14-5
Chemical Name:
3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one
Synonyms
ACID CAPTOR H;LABOTEST-BB LT00847264;Dihydropyridopyrimidinone;3,4-dihydropyrido[1,2-a]pyrimidin-2-one;3,4-DIHYDRO-2-PYRIDOL[1,2-A]PYRIMIDINONE;3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one;2H-Pyrido[1,2-a]pyrimidin-2-one,3,4-dihydro-;3,4-Dihydro-2iHi-pyrido[1,2-iai]pyrimidin-2-one;3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one >3,4-DIHYDRO-2H-PYRIDO[1,2-A]PYRIMIDIN-2-ONE 98+%
CBNumber:
CB5311512
Molecular Formula:
C8H8N2O
Molecular Weight:
148.16
MDL Number:
MFCD00042798
MOL File:
5439-14-5.mol
MSDS File:
SDS
TDS File:
TDS
Last updated:2026-09-12 18:53:29
Request For Quotation

3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one Properties

Melting point 185-187 °C
Boiling point 271℃
Density 1.26
Flash point 118℃
storage temp. Sealed in dry,Room Temperature
solubility Chloroform (Sparingly), Methanol (Slightly)
form Solid
pka 2.83±0.20(Predicted)
color Light Yellow
BRN 3667723
InChI InChI=1S/C8H8N2O/c11-8-4-6-10-5-2-1-3-7(10)9-8/h1-3,5H,4,6H2
InChIKey XQIOBBHIEUGFCI-UHFFFAOYSA-N
SMILES C12C=CC=CN1CCC(=O)N=2
FDA UNII YM7NK945JZ

SAFETY

Risk and Safety Statements

Symbol(GHS)  Exclamation Mark (GHS07)
GHS07
Signal word  Warning
Hazard statements  H302-H315-H319-H335
Precautionary statements  P261-P305+P351+P338
Safety Statements  22-24/25
WGK Germany  3
F  9-23
HS Code  29339900

3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one price More Price(29)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 37360 3,4-Dihydro-2-pyridol[1,2-a]pyrimidinone for GC derivatization, ≥99.0% 5439-14-5 10g $140 2022-05-15 Buy
TCI Chemical D1393 3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one >98.0%(HPLC)(T) 5439-14-5 5g $43 2026-04-30 Buy
TCI Chemical D1393 3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one >98.0%(HPLC)(T) 5439-14-5 25g $129 2026-04-30 Buy
Usbiological 274532 3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one Asreported 5439-14-5 5g $316 2026-06-03 Buy
Usbiological 274532 3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one Asreported 5439-14-5 10g $436 2026-06-03 Buy
Product number Packaging Price Buy
37360 10g $140 Buy
D1393 5g $43 Buy
D1393 25g $129 Buy
274532 5g $316 Buy
274532 10g $436 Buy

3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one Chemical Properties, Uses, Production

Preparation

3,4-Dihydro-2h-pyrido[1,2-a]pyrimidin-2-one is prepared by reaction of 2-aminopyridine with either Acrylic Acid itself or an  equivalent (2-bromo- or 2-iodopropionic acid, Methyl Acrylate, ethyl 2-bromopropionate, β- Propiolactone).

storage

The reagent may be dried over P2O5 in vacuo (135 °C/17 mmHg).

Purification Methods

Dissolve it in CHCl3, filter, evaporate, then recrystallise the residue from EtOH/Me2CO (needles) which can be washed with Et2O and dried. It can also be recrystallised from CHCl3/pet ether or CHCl3/hexane. The hydrochloride has m 295-295o (dec, from EtOH or MeOH/Et2O), the hydrobromide has m 299-300o(dec) (from MeOH/Et2O) and the picrate has m 224-226o(corr), m 219-220o from EtOH. [Adams & Pachter J Am Chem Soc 74 4906 1952, Lappin J Org Chem 23 1358 1958, Hurd & Hayao J Am Chem Soc 77 115 1955, Beilstein 24 III/IV 299.]

3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one Preparation Products And Raw materials

Raw materials

Preparation Products

3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one Suppliers

Global Suppliers ( 67)
Supplier Tel Email Country ProdList Advantage
J & K SCIENTIFIC LTD. 18210857532 18210857532 jkinfo@jkchemical.com China 96815 76
Meryer (Shanghai) Chemical Technology Co., Ltd. 4006356688 18621169109 market03@meryer.com China 40202 62
TCI (Shanghai) Development Co., Ltd. 021-67121386 Sales-CN@TCIchemicals.com China 24512 81
Energy Chemical 400-0056266 sales8178@energy-chemical.com China 44850 61
Shanghai Hanhong Scientific Co.,Ltd. 021-54306202 13764082696 info@hanhongsci.com China 42917 64
Beijing Isomersyn Technology CO;LTD 010-82954736 13391601435 sales@isomersyn.com China 3294 57
Hunan Hui Bai Shi Biotechnology Co., Ltd. 0731-85526065 13308475853 ivy@hnhbsj.com China 7236 62
Beijing Taiya Jie Technology Development Co., Ltd. 021-33690831-8001 13552411790;18616022633 postmaster@tyjchem.cn China 1541 55
Jiangsu Aikon Biopharmaceutical R&D co.,Ltd. 025-66113011 13913916777 cfzhang@aikonchem.com China 19902 55
TOKYO CHEMICAL INDUSTRY CO., LTD. 03-36680489 Sales-JP@TCIchemicals.com Japan 28364 80
Supplier Advantage
J & K SCIENTIFIC LTD. 76
Meryer (Shanghai) Chemical Technology Co., Ltd. 62
TCI (Shanghai) Development Co., Ltd. 81
Energy Chemical 61
Shanghai Hanhong Scientific Co.,Ltd. 64
Beijing Isomersyn Technology CO;LTD 57
Hunan Hui Bai Shi Biotechnology Co., Ltd. 62
Beijing Taiya Jie Technology Development Co., Ltd. 55
Jiangsu Aikon Biopharmaceutical R&D co.,Ltd. 55
TOKYO CHEMICAL INDUSTRY CO., LTD. 80

View Latest Price from 3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
3,4-DIHYDRO-2H-PYRIDO[1,2-A]PYRIMIDIN-2-ONE pictures 2025-06-25 3,4-DIHYDRO-2H-PYRIDO[1,2-A]PYRIMIDIN-2-ONE
5439-14-5
 $1.10 1g 99.0% min 100 tons min Shaanxi Dideu Medichem Co. Ltd
3,4-DIHYDRO-2H-PYRIDO[1,2-A]PYRIMIDIN-2-ONE pictures 2020-01-10 3,4-DIHYDRO-2H-PYRIDO[1,2-A]PYRIMIDIN-2-ONE
5439-14-5
 $9.80 1g ≥99% 100kg Career Henan Chemical Co

5439-14-5 (3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one) Related Search:

Clopidol 7-Chloro-4-methyl-2-oxo-3,4-dihydro-2 H-pyrido[1,2-a ]pyrimidine-4-carboxylic acid 9-Methyl-3,4-dihydro-2H-pyrido[1,2-a]pyrimidin-2-one 4,6-Dimethyl-2-oxo-3,4-dihydro-2 H-pyrido[1,2-a ]pyrimidine-4-carboxylic acid 4-Methyl-2-oxo-3,4-dihydro-2H-pyrido[1,2-a]pyrimidine-4-carboxylic acid
3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one 2,4-Dioxo-3,4-dihydro-2H-pyrido[1,2-a]pyrimidine-3-carbaldehyde AURORA KA-6029 AURORA KA-3771 AKOS BB-9251
AKOS BB-9307

1of3

LABOTEST-BB LT00847264 ACID CAPTOR H Dihydropyridopyrimidinone 3,4-DIHYDRO-2-PYRIDOL[1,2-A]PYRIMIDINONE 2H-Pyrido[1,2-a]pyrimidin-2-one,3,4-dihydro- 3,4-DIHYDRO-2H-PYRIDO[1,2-A]PYRIMIDIN-2-ONE 98+% 3,4-dihydropyrido[1,2-a]pyrimidin-2-one 3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one > 3,4-Dihydro-2iHi-pyrido[1,2-iai]pyrimidin-2-one 3,4-DIHYDRO-2H-PYRIDO[1,2-A]PYRIMIDIN-2-ONE ISO 9001：2015 REACH 3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one 5439-14-5 Condensation & Active Esterification Condensation & Active Esterification Synthetic Organic Chemistry Esterification ReagentsBuilding Blocks Alkylation Reagents Derivatization Reagents Heterocyclic Building Blocks Pyrimidines