ChemicalBook CAS DataBase List 2-Naphthylacetic acid

2-Naphthylacetic acid synthesis

15synthesis methods

Product Name:2-Naphthylacetic acid
CAS Number:581-96-4
Molecular formula:C12H10O2
Molecular Weight:186.21

2876-70-2 Synthesis

2876-70-2
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$212.00/1g

581-96-4
224 suppliers
$6.00/5g

Yield:581-96-4 91%

Reaction Conditions:

with water;sodium hydroxide in 1,4-dioxane at 60; pH=10 - 14; for 2 h;

Steps:

24 Preparation of 2-naphthaleneacetic acid from 2-methylnaphthalene and ethanol

2-Methylnaphthalene (2.13 g), ethanol (46 mg), di-tert-butyl peroxide (73 mg, 1 equivalent), and Pd(Xantphos)Cl₂(3.8 mg, 1 mol %) were added into a reaction kettle, into which 10 atm carbon monoxide was introduced. The reaction was heated to 120° C., and stirred at this constant temperature for 16 h. After the reaction was completed, carbon monoxide was discharged, and 78 mg ethyl 2-naphthaleneacetate was obtained by column chromatography, in a yield of 73%. ¹HNMR (400 MHz, CDCl₃) δ 1.24 (t, J=6.8 Hz, 3H), 3.78 (s, 2H), 4.14 (q, J=7.2 Hz, 2H), 7.41-7.49 (m, 3H), 7.73 (s, 1H), 7.79-7.83 (m, 3H); ¹³CNMR (100 MHz, CDCl₃) δ 14.2, 41.6, 60.9, 125.8, 126.1, 127.4, 127.7, 127.9, 128.2, 131.7, 132.5, 133.5, 171.6; HRMS (ESI) calcd. for C₁₄H₁₄NaO₂[M+Na]: 237.0886. found: 237.0886. The ethyl 2-naphthaleneacetate obtained was dissolved in 1,4-dioxane. 6 N sodium hydroxide solution was added, and the reaction was heated to 60° C. After 2 h of reaction, the pH value was adjusted to 1 by adding 2 N hydrochloric acid. After removing the organic solvent under reduced pressure, 62 mg product 2-naphthaleneacetic acid was obtained by extraction with ethyl acetate, and the yield of hydrolysis was 91%.

References:

US2013/303798,2013,A1 Location in patent:Paragraph 0018; 0074; 0075

7498-57-9 Synthesis