HuagongsheHuagongshe Chemistry Print Report · For research reference only
Chlorendic anhydride → Chroman
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Chlorendic anhydride | HCID 8265 | — |
| Reactant | Citraconic Anhydrides | HCID 12012 | — |
| Reactant | 3,4,5,6-Tetrahydrophthalic anhydride | HCID 12475 | — |
| Reactant | 826-62-0 | HCID 13223 | — |
| Reactant | Hexahydrophthalic anhydride | HCID 85689 | — |
| Reactant | Hexahydro-4,7-methano-2-benzofuran-1,3-dione | HCID 96196 | — |
| Reactant | 3a,4,7,7a-Tetrahydro-5-methyl-1,3-isobenzofurandione | HCID 98496 | — |
| Reactant | 3a,4,7,7a-Tetrahydro-5-methyl-4,7-methanoisobenzofuran-1,3-dione | HCID 520186 | — |
| Product | Chroman | HCID 136319 | — |
Reaction Steps
The same reaction and isolation procedures as Synthesis Example 85 were followed except that 1.52 g of 1-cyclohexene-1,2-dicarboxylic anhydride, 1.54 g of cyclohexane-1,2-dicarboxylic anhydride, 1.12 g of citraconic anhydride, 1.66 g of norbornane-2,3-dicarboxylic anhydride, 3.71 g of 1,4,5,6,7,7-hexachloro-5-norbornene-2,3-dicarboxylic anhydride, 1.66 g of 4-methyl-4-cyclohexene-1,2-dicarboxylic anhydride or 1.78 g of 5-methyl-5-norbornene-2,3-dicarboxylic anhydride was used in lieu of 1.64 g of 5-norbornene-2,3-dicarboxylic anhydride to give the corresponding 3,4-dihydro-2H-benzopyran derivative. The results are given in Table 12. ##STR109##
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US04523024 |
| Source dataset | uspto-grants-1985_06 |
| ORD ID | ord-dbd59f5d046f4d6081dfd2d1561f630b |
| Source note | uspto-grants-1985_06 |