HuagongsheHuagongshe Chemistry Print Report · For research reference only
Isoprene → 3a,4,7,7a-Tetrahydro-5-methyl-1,3-isobenzofurandione
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Isoprene | HCID 6557 | — |
| Reactant | Maleic Anhydride | HCID 7923 | — |
| Reactant | 4-Methylphthalic anhydride | HCID 88069 | — |
| Product | 3a,4,7,7a-Tetrahydro-5-methyl-1,3-isobenzofurandione | HCID 98496 | — |
Reaction Steps
In a preferred mode of the process of this invention, 4-methylphthalic anhydride (4-MPA) is prepared. This preparation comprises reacting isoprene and maleic anhydride to form 4-methyl-1,2,3,6-tetrahydrophthalic anhydride (4-MTPA), then reacting this product with sulfuryl chloride in the presence of pyridine to form 4-MPA.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US04564687 |
| Source dataset | uspto-grants-1986_01 |
| ORD ID | ord-fc053f0d3afb4278a6f64917a633606a |
| Source note | uspto-grants-1986_01 |