rac-5-<3,4-dihydro-7-(phenylmethoxy)-2H-1-benzopyran-2-yl>-2,4-pentadienoic acid ethyl ester

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Chemical Name:rac-5-<3,4-dihydro-7-(phenylmethoxy)-2H-1-benzopyran-2-yl>-2,4-pentadienoic acid ethyl ester
CAS No.:96565-67-2
Molecular Formula:C₂₃H₂₄O₄
Molecular Weight:364.441
Hs Code.:

Synonyms:rac-5-<3,4-dihydro-7-(phenylmethoxy)-2H-1-benzopyran-2-yl>-2,4-pentadienoic acid ethyl ester

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Chemical Property of rac-5-<3,4-dihydro-7-(phenylmethoxy)-2H-1-benzopyran-2-yl>-2,4-pentadienoic acid ethyl ester

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Technology Process of rac-5-<3,4-dihydro-7-(phenylmethoxy)-2H-1-benzopyran-2-yl>-2,4-pentadienoic acid ethyl ester

There total 5 articles about rac-5-<3,4-dihydro-7-(phenylmethoxy)-2H-1-benzopyran-2-yl>-2,4-pentadienoic acid ethyl 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: 30.0%

: 51544-70-8,67348-25-8
3-ethoxycarbonylprop-2-enylidenetriphenylphosphorane

: 96565-59-2
rac-3,4-dihydro-7-(phenylmethoxy)-2H-1-benzopyran-2-carboxaldehyde

: 96565-67-2
rac-5-<3,4-dihydro-7-(phenylmethoxy)-2H-1-benzopyran-2-yl>-2,4-pentadienoic acid ethyl ester

Guidance literature:: In toluene; at 100 ℃; for 3.5h;
DOI:10.1021/jm00128a028

Reference yield:

: 23866-72-0
ethyl 7-hydroxy-4-oxo-4H-chromen-2-carboxylate

: 96565-67-2
rac-5-<3,4-dihydro-7-(phenylmethoxy)-2H-1-benzopyran-2-yl>-2,4-pentadienoic acid ethyl ester

Guidance literature:: Multi-step reaction with 4 steps

1: 73.4 percent / H₂ / 10percent Pd/C / acetic acid / 41 h / Ambient temperature

2: 86.5 percent / K₂CO₃ / dimethylformamide / 65 h / Ambient temperature

3: 70 percent / diisobutylaluminum hydride / toluene / 2 h / -78 °C

4: 30 percent / toluene / 3.5 h / 100 °C

With hydrogen; diisobutylaluminium hydride; potassium carbonate; palladium on activated charcoal; In acetic acid; N,N-dimethyl-formamide; toluene;
DOI:10.1021/jm00128a028

Reference yield:

: 96566-14-2
(R)-3,4-dihydro-7-hydroxy-2H-1-benzopyran-2-carboxylic acid,ethyl ester

: 96565-67-2
rac-5-<3,4-dihydro-7-(phenylmethoxy)-2H-1-benzopyran-2-yl>-2,4-pentadienoic acid ethyl ester

Guidance literature:: Multi-step reaction with 3 steps

1: 86.5 percent / K₂CO₃ / dimethylformamide / 65 h / Ambient temperature

2: 70 percent / diisobutylaluminum hydride / toluene / 2 h / -78 °C

3: 30 percent / toluene / 3.5 h / 100 °C

With diisobutylaluminium hydride; potassium carbonate; In N,N-dimethyl-formamide; toluene;
DOI:10.1021/jm00128a028