Water → HCID 86734382, compound

HRID 2286898Notes

Reaction equation

HRID 2286898 reaction equation
[CH:1]1[C:14]2[C:13]([CH2:19][C:20](O)=[O:21])([CH2:15][C:16]([OH:18])=[O:17])[C:12]3[C:7](=[CH:8][CH:9]=[CH:10][CH:11]=3)[O:6][C:5]=2[CH:4]=[CH:3][CH:2]=1.O>C(OC(=O)C)(=O)C>[O:17]1[C:20](=[O:21])[CH2:19][C:13]2([C:12]3[CH:11]=[CH:10][CH:9]=[CH:8][C:7]=3[O:6][C:5]3[C:14]2=[CH:1][CH:2]=[CH:3][CH:4]=3)[CH2:15][C:16]1=[O:18]

Participants

4

Reactant 2

HCID 962WaterHCID 23460518HCID 23460518, compound

Product 1

HCID 86734382HCID 86734382, compound

Reagents, catalysts & solvents 1

HCID 7918Acetic AnhydrideSolvent

Procedure

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.

Workup

  1. temperatureunder reflux for 1 hour
  2. temperaturecooled
  3. extractionExtraction with ethyl acetate

Sources & evidence

ORD record
ord-d0af257c16c547028166273704bedcdc
Source dataset
uspto-grants-1981_05
Patent number
US04268514

Reaction notes

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