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

3,4-二氢-2H-吡啶并[1,2-a]嘧啶-2-酮

Also known as: 2H-Pyrido[1,2-a]pyrimidin-2-one, 3,4-dihydro-, 2H-Pyrido[1,2-a]pyrimidin-2-one,3,4-dihydro-, 3,4-DIHYDRO-2H-PYRIDO[1,2-A]PYRIMIDIN-2-ONE, 3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one, 3,4-dihydropyrido[1,2-a]pyrimidin-2-one, ACID CAPTOR H, Dihydropyridopyrimidinone, EINECS 226-618-2, LABOTEST-BB LT00847264, MFCD00042798

3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one (CAS 5439-14-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C8H8N2O and a molecular weight of 148.162 g/mol. It is also known as 2H-Pyrido[1,2-a]pyrimidin-2-one, 3,4-dihydro-, 2H-Pyrido[1,2-a]pyrimidin-2-one,3,4-dihydro- and 3,4-DIHYDRO-2H-PYRIDO[1,2-A]PYRIMIDIN-2-ONE. Key properties include a melting point of 185-187ºC, a boiling point of 271.3±23.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 117.9±22.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
5439-14-5
Jingsj CID
J-29885-2
Molecular Formula
C8H8N2O
Chinese Name
3,4-二氢-2H-吡啶并[1,2-a]嘧啶-2-酮
Molecular Weight
148.162 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

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Physicochemical Properties

Melting Point185-187ºC
Boiling Point271.3±23.0 °C at 760 mmHg
Density1.3±0.1 g/cm3
Flash Point117.9±22.6 °C

Frequently Asked Questions

What is the CAS number of 3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one?

The CAS number of 3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one is 5439-14-5.

What are the molecular formula and molecular weight of 3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one?

3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one has molecular formula C8H8N2O and molecular weight 148.162 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one (CAS 5439-14-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-29885-2 (accessed 2026-10-22).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.