5-Methyl-7,7a-dihydroisobenzofuran-1,3(3aH,6H)-dione

Base Information

• Chemical Name: 5-Methyl-7,7a-dihydroisobenzofuran-1,3(3aH,6H)-dione
• CAS No.: 19438-64-3
• Molecular Formula: C9H10O3
• Molecular Weight: 166.177
• Hs Code.: 2917399090
• European Community (EC) Number: 606-311-3
• DSSTox Substance ID: DTXSID5058692
• Nikkaji Number: J169.049C
• Mol file: 19438-64-3.mol

Synonyms:19438-64-3;5-Methyl-7,7a-dihydroisobenzofuran-1,3(3aH,6H)-dione;6-methyl-3a,4,5,7a-tetrahydroisobenzofuran-1,3-dione;6-methyl-3a,4,5,7a-tetrahydro-2-benzofuran-1,3-dione;Methyltetrahydrophthalicanhydride;6-methyl-1,3,3a,4,5,7a-hexahydro-2-benzofuran-1,3-dione;4-Methyl-delta-3-tetrahydrophthalic anhydride;SCHEMBL216911;DTXSID5058692;MWSKJDNQKGCKPA-UHFFFAOYSA-N;MFCD00870768;AKOS006273444;AS-12153;NS00026340;A880202;J-012591

Chemical Property of 5-Methyl-7,7a-dihydroisobenzofuran-1,3(3aH,6H)-dione

Chemical Property:

• Vapor Pressure: 0.00184mmHg at 25°C
• Refractive Index: 1.53
• Boiling Point: 308.9 °C at 760 mmHg
• Flash Point: 146.8 °C
• PSA: 43.37000
• Density: 1.221 g/cm³
• LogP: 1.04230
• XLogP3: 0.7
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 3
• Rotatable Bond Count: 0
• Exact Mass: 166.062994177
• Heavy Atom Count: 12
• Complexity: 278

Purity/Quality:

99% ^*data from raw suppliers

MethylTetrahydrophthalicAnhydride ^*data from reagent suppliers

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

SDS file from LookChem

Useful:

• Canonical SMILES: CC1=CC2C(CC1)C(=O)OC2=O
• Uses: Methyl tetrahydrophthalic anhydride can be used for unsaturated polyester resin, epoxy resin curing agent, pesticide intermediate, potting of dry-type transformer, etc.

Technology Process of 5-Methyl-7,7a-dihydroisobenzofuran-1,3(3aH,6H)-dione

There total 2 articles about 5-Methyl-7,7a-dihydroisobenzofuran-1,3(3aH,6H)-dione 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: 99.0%

maleic anhydride (108-31-6) + isoprene (78-79-5,9003-31-0) → 4-Methyl-Δ3-tetrahydrophthalic anhydride (19438-64-3)

Guidance literature:

With C₃H₃F₆NO₁₀S₃*CHF₃O₃S; at 50 ℃; for 2.5h; Reagent/catalyst;

Reference yield: 37.1%

4-methyl-1,2,3,6-tetrahydrophthalic anhydride (3425-89-6) → 4-methylphthalic anhydride (19438-61-0) + 4-Methyl-Δ1-tetrahydrophthalic anhydride (19438-59-6) + 4-methyl-hexahydrophthalic anhydride (19438-60-9) + 4-Methyl-Δ3-tetrahydrophthalic anhydride (19438-64-3)

Guidance literature:

With hydrogen; aluminium containing platinum black; at 150 ℃; for 2.5h; Product distribution; effect of further catalysts and various catalyst concentration, effect of operation time and temperature;

upstream raw materials:

4-methyl-1,2,3,6-tetrahydrophthalic anhydride

maleic anhydride

isoprene

Refernces

• 1、 Dokuchaeva, T. G.,Sibarov, D. A.,Lezdin, S. Yu.,Silin, A. A.. "PREPARATION OF A LIQUID CURING AGENT FOR EPOXY COMPOSITES OF ISOMETHYLTETRAHYDROPHTHALIC ANHYDRIDE". . p. 2605 - 2608. Retrieved 2007/10/02.
• 2、 Lezdin, S. Yu.,Sibarov, D. A.,Dokuchaeva, T. G.,Proskuryakov, V. A.. "PREPARATION OF METHYLPHTHALIC ANHYDRIDE BY DEHYDROHYDROGENATION". . p. 2278 - 2281. Retrieved 2007/10/02.