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Basic Information
CAS No.: 71042-72-3
Name: 2,3-Dihydro-7-methyl-1H-indene-4-carboxylic acid ethyl ester
Molecular Structure:
Molecular Structure of 71042-72-3 (2,3-Dihydro-7-methyl-1H-indene-4-carboxylic acid ethyl ester)
Formula: C13H16O2
Molecular Weight: 204.269
Synonyms: 1H-Indene-4-carboxylic acid,2,3-dihydro-7-methyl-,ethyl ester;4-(Ethoxycarbonyl)-7-methylindan;7-methyl-2,3-dihydro-1H-indene-4-carboxylic acid ethyl ester;Ethyl 7-methyl-4-indancarboxylate;
Density: 1.079g/cm3
Boiling Point: 330.9°Cat760mmHg
Flash Point: 150°C
PSA: 26.30000
LogP: 2.66040
Synthetic route
7148-07-4

1-pyrrolidinocyclopent-1-ene

2396-84-1

(2E,4E)-ethyl hexa-2,4-dienoate

71042-72-3

ethyl 7-methyl-2,3-dihydro-1H-indene-4-carboxylate

Conditions
ConditionsYield
Stage #1: 1-pyrrolidinocyclopent-1-ene; (2E,4E)-ethyl hexa-2,4-dienoate In 5,5-dimethyl-1,3-cyclohexadiene Reflux;
Stage #2: With sulfur at 250℃; for 2h;
58%
With 2.) S 1.) xylene, reflux, 18h, 2.) 230 deg C, 30 min; Yield given. Multistep reaction;
7148-07-4

1-pyrrolidinocyclopent-1-ene

2396-84-1

(2E,4E)-ethyl hexa-2,4-dienoate

A

71042-72-3

ethyl 7-methyl-2,3-dihydro-1H-indene-4-carboxylate

B

71042-73-4

7-Methyl-2,3,7,7a-tetrahydro-1H-indene-4-carboxylic acid ethyl ester

Conditions
ConditionsYield
In xylene for 18h; Heating; Yield given. Yields of byproduct given. Title compound not separated from byproducts;
71042-72-3

ethyl 7-methyl-2,3-dihydro-1H-indene-4-carboxylate

71042-74-5

4-(7-Methylindan)carboxylic acid

Conditions
ConditionsYield
With potassium hydroxide In ethanol Heating;95%
71042-72-3

ethyl 7-methyl-2,3-dihydro-1H-indene-4-carboxylate

ethyl 6-bromo-7-methyl-2,3-dihydro-1H-indene-4-carboxylate

Conditions
ConditionsYield
With bromine; nitric acid; silver nitrate; acetic acid In water at 20℃;80%
71042-72-3

ethyl 7-methyl-2,3-dihydro-1H-indene-4-carboxylate

71042-75-6

4-(Chloromethanoyl)-7-methylindan

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 95 percent / aq. KOH / ethanol / Heating
2: 97 percent / thionyl chloride / 1 h / Heating
View Scheme
71042-72-3

ethyl 7-methyl-2,3-dihydro-1H-indene-4-carboxylate

78064-87-6

(7-methyl-indan-4-yl)-[2]naphthyl ketone

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: 95 percent / aq. KOH / ethanol / Heating
2: 97 percent / thionyl chloride / 1 h / Heating
3: AlCl3 / CH2Cl2 / 1 h / Heating
View Scheme
Multi-step reaction with 3 steps
1: 95 percent / aq. KOH / ethanol / Heating
2: 97 percent / thionyl chloride / 1 h / Heating
3: 1.) Mg, cuprous iodide / 1.) THF, 45 deg C, 15 min, 2.) 45 deg C, 0.5 h
View Scheme
71042-72-3

ethyl 7-methyl-2,3-dihydro-1H-indene-4-carboxylate

63665-87-2

(7-methyl-indan-4-yl)-[1]naphthyl ketone

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: 95 percent / aq. KOH / ethanol / Heating
2: 97 percent / thionyl chloride / 1 h / Heating
3: AlCl3 / CH2Cl2 / 1 h / Heating
View Scheme
Multi-step reaction with 3 steps
1: 95 percent / aq. KOH / ethanol / Heating
2: 97 percent / thionyl chloride / 1 h / Heating
3: 1.) Mg, cuprous iodide / 1.) THF, 45 deg C, 15 min, 2.) 45 deg C, 0.5h
View Scheme
71042-72-3

ethyl 7-methyl-2,3-dihydro-1H-indene-4-carboxylate

6-bromo-7-methyl-2,3-dihydro-1H-indene-4-carboxylic acid

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: bromine; silver nitrate; acetic acid; nitric acid / water / 20 °C
2: lithium hydroxide monohydrate; water / tetrahydrofuran; methanol / 20 °C
View Scheme
71042-72-3

ethyl 7-methyl-2,3-dihydro-1H-indene-4-carboxylate

C11H10BrClO

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: bromine; silver nitrate; acetic acid; nitric acid / water / 20 °C
2: lithium hydroxide monohydrate; water / tetrahydrofuran; methanol / 20 °C
3: oxalyl dichloride; N,N-dimethyl-formamide / dichloromethane / 20 °C / Inert atmosphere
View Scheme
71042-72-3

ethyl 7-methyl-2,3-dihydro-1H-indene-4-carboxylate

(6-bromo-7-methyl-2,3-dihydro-1H-indene-4-yl)(4-methoxyphenyl)methanone

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: bromine; silver nitrate; acetic acid; nitric acid / water / 20 °C
2: lithium hydroxide monohydrate; water / tetrahydrofuran; methanol / 20 °C
3: oxalyl dichloride; N,N-dimethyl-formamide / dichloromethane / 20 °C / Inert atmosphere
4: aluminum (III) chloride / dichloromethane / 2 h / 0 - 20 °C
View Scheme
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