17218-47-2 Purity
99%
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Specification
This study determined the standard molar enthalpies of formation for dibenzofuran and its monomethylated derivatives using both experimental calorimetry methods and computational techniques. This work obtained enthalpy measurements for gas-phase substances using G3(MP2)//B3LYP computational methods.
The working reactions described by Eqs. 11-15 with the correspondent calculated values for the enthalpies of formation in the gaseous phase, at T = 298.15 K. provided the basis for determining the enthalpies of formation for methyl benzofuran derivatives 4-methylbenzofuran (4- MeBF), 5-methylbenzofuran (5-MeBF), 6-methylbenzofuran (6-MeBF) and 7-methylbenzofuran (7-MeBF).
The data shows enthalpy values of (-21.7 ± 0.4) kJ mol-1 for 4-methylbenzofuran and (-16.7 ± 0.5) kJ mol-1 for 5-methylbenzofuran along with (-17.4 ± 0.5) kJ mol-1 for 6-methylbenzofuran and (-22.6 ± 0.4) kJ mol-1 for 7-methylbenzofuran.
Benzofurans are efficiently and selectively olefinated at C2 using Pd(OAc)2 with a catalytic amount of 11-molybdovanadophosphoric acid (H4PMo11VO40) in an oxygen atmosphere. As an example, 7-methylbenzofuran was reacted with styrene (2a) to give the desired product 3p in 86% yield.
General Synthesis Procedure
· In a Schlenk-type sealed tube (50 mL) equipped with a Teflon high-pressure valve and side arm, mixed 7-methylbenzofuran (1.0 mmol), styrene (0.2 mmol), Pd(OAc)2 (0.01 mmol), H3PMo11VO40 (0.006 mmol), Ac-Gly-OH (0.03 mmol), Na2CO3 (0.2 mmol), and DMF (1 mL).
· The tube underwent vacuum evacuation before being filled with O2 (1 atm) from a balloon three times. The mixture underwent stirring and heating in an oil bath at 120°C for 24 hours. The crude mixture was diluted with CH2Cl2 to reach 5 mL after cooling to room temperature before the addition of 0.2 mmol C16H34 as an internal standard for GC analysis.
· After conducting GC and GC-MS analysis, removed volatile components using reduced pressure followed by silica gel column chromatography of the residue with petroleum ether to obtain product 3p at an 86% yield.
The molecular formula of 7-Methylbenzofuran is C9H8O.
The molecular weight of 7-Methylbenzofuran is 132.16 g/mol.
The IUPAC name of 7-Methylbenzofuran is 7-methyl-1-benzofuran.
The InChIKey of 7-Methylbenzofuran is PHQXPPBIJBCIMI-UHFFFAOYSA-N.
The canonical SMILES of 7-Methylbenzofuran is CC1=C2C(=CC=C1)C=CO2.
The CAS number of 7-Methylbenzofuran is 17059-52-8.
The European Community (EC) number of 7-Methylbenzofuran is 241-123-1.
The UNII of 7-Methylbenzofuran is GZ7272436A.
The XLogP3-AA value of 7-Methylbenzofuran is 2.7.
The topological polar surface area of 7-Methylbenzofuran is 13.1Ų.