Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | Benzaldehyde | HCID 240 | — |
| Reactant | HCID 12307209 | HCID 12307209 | — |
| Catalyst | Hydrochloric Acid | HCID 313 | — |
| Product | HCID 53800017 | HCID 53800017 | 88% |
Reaction Steps
A mixture of 0.20 g of 2,3,6,7-tetrahydro-dipyrano-[4,3,2-de:2',3',4'-ij]-phthalazine and 5.0 g of benzaldehyde is heated up to 130° C. Then 6 drops of concentrated hydrochloric acid are added and the mixture is stirred for 30 minutes at 130° C, after which the mixture is evaporated to dryness in vacuo. The residue is crystallised from n-butanol yielding 3,6-di-benzylidene-2,7-dihydrodipyrano-[4,3,2-de:2',3',4'-ij]-phthalazine in a yield of 88%. Melting point: 242° C.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|
| Patent number | US04002617 |
|---|
| Source dataset | uspto-grants-1977_01 |
|---|
| ORD ID | ord-0a6767d998d94866a943fb260a0fa4a3 |
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| Source note | uspto-grants-1977_01 |
|---|
