(E)-3-[4-(2-ethyl-5,7-dimethylpyrazolo[1,5-a]pyrimidin-3-ylmethyl)phenyl]acrylic acid methyl ester

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Chemical Name:(E)-3-[4-(2-ethyl-5,7-dimethylpyrazolo[1,5-a]pyrimidin-3-ylmethyl)phenyl]acrylic acid methyl ester
CAS No.:1401728-64-0
Molecular Formula:C₂₁H₂₃N₃O₂
Molecular Weight:349.433
Hs Code.:

Synonyms:(E)-3-[4-(2-ethyl-5,7-dimethylpyrazolo[1,5-a]pyrimidin-3-ylmethyl)phenyl]acrylic acid methyl ester

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Chemical Property of (E)-3-[4-(2-ethyl-5,7-dimethylpyrazolo[1,5-a]pyrimidin-3-ylmethyl)phenyl]acrylic acid methyl ester

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Technology Process of (E)-3-[4-(2-ethyl-5,7-dimethylpyrazolo[1,5-a]pyrimidin-3-ylmethyl)phenyl]acrylic acid methyl ester

There total 4 articles about (E)-3-[4-(2-ethyl-5,7-dimethylpyrazolo[1,5-a]pyrimidin-3-ylmethyl)phenyl]acrylic acid methyl ester 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: 95.0%

: 1401728-63-9
3-(4-bromobenzyl)-2-ethyl-5,7-dimethylpyrazolo[1,5-a]pyrimidine

: 292638-85-8,9003-21-8,96-33-3
acrylic acid methyl ester

: 1401728-64-0
(E)-3-[4-(2-ethyl-5,7-dimethylpyrazolo[1,5-a]pyrimidin-3-ylmethyl)phenyl]acrylic acid methyl ester

Guidance literature:: With bis(tri-t-butylphosphine)palladium⁽⁰⁾; N-Methyldicyclohexylamine; In 1,4-dioxane; at 130 ℃; for 0.25h; Inert atmosphere; Microwave irradiation;
DOI:10.1021/acs.jmedchem.6b01703

Reference yield:

: 57775-08-3
3-(4-Bromo-phenyl)-propionitrile

: 1401728-64-0
(E)-3-[4-(2-ethyl-5,7-dimethylpyrazolo[1,5-a]pyrimidin-3-ylmethyl)phenyl]acrylic acid methyl ester

Guidance literature:: Multi-step reaction with 4 steps

1.1: potassium 2-methylbutan-2-olate / tetrahydrofuran; toluene / 20 °C

1.2: 0.33 h / 20 °C

2.1: hydrazine hydrate / ethanol / 0.25 h / 140 °C / Microwave irradiation

3.1: trifluoroacetic acid / 1,4-dioxane / 20 °C

4.1: bis(tri-t-butylphosphine)palladium ⁽⁰⁾; N-Methyldicyclohexylamine / 1,4-dioxane / 0.08 h / 130 °C / Microwave irradiation

With bis(tri-t-butylphosphine)palladium ⁽⁰⁾; N-Methyldicyclohexylamine; potassium 2-methylbutan-2-olate; hydrazine hydrate; trifluoroacetic acid; In tetrahydrofuran; 1,4-dioxane; ethanol; toluene;

Reference yield:

: 1401728-61-7
2-(4-bromobenzyl)-3-oxopentanenitrile

: 1401728-64-0
(E)-3-[4-(2-ethyl-5,7-dimethylpyrazolo[1,5-a]pyrimidin-3-ylmethyl)phenyl]acrylic acid methyl ester

Guidance literature:: Multi-step reaction with 3 steps

1.1: acetic acid; hydrazine hydrate / ethanol / 0.25 h / 140 °C / Microwave irradiation

1.2: 160 °C

2.1: trifluoroacetic acid / 1,4-dioxane / 20 °C

3.1: bis(tri-t-butylphosphine)palladium ⁽⁰⁾; N-Methyldicyclohexylamine / 1,4-dioxane / 0.08 h / 130 °C / Microwave irradiation

With bis(tri-t-butylphosphine)palladium ⁽⁰⁾; N-Methyldicyclohexylamine; hydrazine hydrate; acetic acid; trifluoroacetic acid; In 1,4-dioxane; ethanol;