HuagongsheHuagongshe Chemistry Print Report · For research reference only
Water → HCID 86734382, compound
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Water | HCID 962 | — |
| Reactant | HCID 23460518 | HCID 23460518 | — |
| Solvent | Acetic Anhydride | HCID 7918 | — |
| Product | HCID 86734382 | HCID 86734382 | — |
Reaction Steps
A solution of xanthene 9,9-diacetic acid (0.8 g.) in acetic anhydride (3 ml.) is heated under reflux for 1 hour, cooled and poured into water. Extraction with ethyl acetate gives xanthene-9-spiro-4'-tetrahydropyran-2',6'-dione which is recrystallised from ethyl acetate-petroleum ether (b.p. 60°-80° C.), m.p. 188°-190° C.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US04268514 |
| Source dataset | uspto-grants-1981_05 |
| ORD ID | ord-d0af257c16c547028166273704bedcdc |
| Source note | uspto-grants-1981_05 |