4H-Pyrido[1,2-a]pyriMidin-4-one, 3-ethyl-6,7,8,9-tetrahydro-9-hydroxy-2-Methyl-

Base Information

• Chemical Name: 4H-Pyrido[1,2-a]pyriMidin-4-one, 3-ethyl-6,7,8,9-tetrahydro-9-hydroxy-2-Methyl-
• CAS No.: 849903-79-3
• Molecular Formula: C11H16N2O2
• Molecular Weight: 208.26
• Hs Code.: 2933990090
• Mol file: 849903-79-3.mol

Synonyms:3-ethyl-6,7,8,9-tetrahydro-9-hydroxy-2-methyl-4H-pyrrido[1,2-a]-pyrimidin-4-one;3-ETHYL-6,7,8,9-TETRAHYDRO-9-HYDROXY-2-METHYL-4H-PYRIDO[1,2-A]PYRIMIDIN-4-ONE;3-ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one;

Chemical Property of 4H-Pyrido[1,2-a]pyriMidin-4-one, 3-ethyl-6,7,8,9-tetrahydro-9-hydroxy-2-Methyl-

Chemical Property:

• Boiling Point: 349.0±44.0 °C(Predicted)
• PKA: 13.01±0.60(Predicted)
• PSA: 55.12000
• Density: 1.29±0.1 g/cm3(Predicted)
• LogP: 0.94130

Purity/Quality:

98%,99%, ^*data from raw suppliers

3-Ethyl-6,7,8,9-tetrahydro-9-hydroxy-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one ^*data from reagent suppliers

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

SDS file from LookChem

Useful:

• Uses: 3-Ethyl-6,7,8,9-tetrahydro-9-hydroxy-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one is used in the synthesis of Paliperidone (P141000). Intermediate. 3-Ethyl-6,7,8,9-tetrahydro-9-hydroxy-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (Paliperidone USP Related Compound A) is used in the synthesis of Paliperidone (P141000). Intermediate.

Technology Process of 4H-Pyrido[1,2-a]pyriMidin-4-one, 3-ethyl-6,7,8,9-tetrahydro-9-hydroxy-2-Methyl-

There total 5 articles about 4H-Pyrido[1,2-a]pyriMidin-4-one, 3-ethyl-6,7,8,9-tetrahydro-9-hydroxy-2-Methyl- which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 8.0%

3-(2-chloroethyl)-9-hydroxy-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one monohydrochloride (849727-62-4) → 3-ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one (849903-79-3)

Guidance literature:

With palladium 10% on activated carbon; hydrogen; In methanol; at 50 - 55 ℃; under 2172.08 - 2947.82 Torr;

DOI:10.1080/00304948.2016.1165060

Reference yield:

9-(benzyloxy)-3-(2-chloroethyl)-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (147687-17-0) → 3-(2-chloroethyl)-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one (130049-82-0) + 3-ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one (849903-79-3)

Guidance literature:

With hydrogenchloride; hydrogen; 1% Pd/C; In methanol; water; at 25 - 30 ℃; for 3.5h; under 735.572 - 1471.14 Torr; Product distribution / selectivity; Autoclave;

Reference yield:

paliperidone → 3-ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one (849903-79-3) + C23H27FN4O4 + 5-fluoro-3-(4-piperidinyl)-1,2-benzisoxazole (84163-64-4)

Guidance literature:

With hydrogenchloride; potassium permanganate; water; at 25 ℃; Concentration; Temperature; Kinetics; Mechanism;

DOI:10.14233/ajchem.2019.21604

upstream raw materials:

9-(benzyloxy)-3-(2-chloroethyl)-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one

3-(2-chloroethyl)-9-hydroxy-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one monohydrochloride

3-acetyl-2-oxo-4,5-dihydrofuran

2-amino-3-hydroxypyridine

Refernces

• 1、 Solanki, Pavankumar V.,Uppelli, Sekhar Babu,Sarode, Ganesh G.,Kardile, Pritesh B.,Bembalkarb, Saroj R.,Mathad, Vijayavitthal T.. "Preparation of 3-(2-Chloroethyl)-6,7,8,9-tetrahydro-9-hydroxy-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one, a Key Intermediate for the Synthesis of Paliperidone". . p. 296 - 302. Retrieved 2016/07/06.