ChemicalBook CAS DataBase List TEREPHTHALIC ACID 2-HYDROXYETHYL METHYL ESTER

TEREPHTHALIC ACID 2-HYDROXYETHYL METHYL ESTER synthesis

8synthesis methods

Product Name:TEREPHTHALIC ACID 2-HYDROXYETHYL METHYL ESTER
CAS Number:3645-00-9
Molecular formula:C11H12O5
Molecular Weight:224.21

120-61-6 Synthesis

120-61-6
452 suppliers
$6.00/25g

107-21-1 Synthesis

107-21-1
1338 suppliers
$10.00/25g

TEREPHTHALIC ACID BIS(2-HYDROXYETHYL) ESTER

959-26-2
99 suppliers
$8.00/5g

TEREPHTHALIC ACID 2-HYDROXYETHYL METHYL ESTER

3645-00-9
62 suppliers
$114.00/1g

Yield:-

Reaction Conditions:

1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidine for 24 h;Product distribution / selectivity;

Steps:

32
Comparison Examples 29 to 34Glycolysis of Dimethyl Terephthalate (DMT) at Ambient Temperature with DBU and TBDMaterials. DMT and Amberlyst-15 was purchased from Sigma-Aldrich and used as received.To a 5 ml sample tube containing DMT (0.48 g, 2.5 mmol) was charged predetermined amounts of EG and a catalyst (DBU or TBD, 0.125 mmol, 0.05 eq.). Three levels of EG were used with each catalyst: 2.84 molar equivalents, 8 molar equivalents, and 16 molar equivalents of EG relative to moles of DMT. After the mixture was stirred for 24 hours, THF (8 mL) and Amberlyst-15 (150 mg) were added to the mixture to quench the reaction and allow the slurry to become homogeneous. Aliquots of the solution were taken for ¹H NMR and GPC analysis in order to evaluate the conversion and content. FIG. 12 shows a typical GPC curve of the crude product. Peak labeled A corresponds to oligomers, peak labeled B corresponds to BHET, peak labeled C corresponds to 2-hydroxyethyl methyl terephthalate (HEMT), and peaks labeled D correspond to EG and DMT. HEMT is the intermediate in glycolysis of DMT and has the following structure:The GPC results are summarized in Table 6 below.

References:

KING ABDULAZIZ CITY FOR SCIENCE AND TECHNOLOGY;INTERNATIONAL BUSINESS MACHINES CORPORATION US2012/223270, 2012, A1 Location in patent:Page/Page column 15