Water → CID 37314

HRID 862217

Reaction equation

HRID 862217 reaction equation
Cl[P:2]1[C:7]2[CH:8]=[CH:9][CH:10]=[CH:11][C:6]=2[C:5]2[CH:12]=[CH:13][CH:14]=[CH:15][C:4]=2[O:3]1.[OH2:16]>>[O:16]=[PH:2]1[C:7]2[CH:8]=[CH:9][CH:10]=[CH:11][C:6]=2[C:5]2[CH:12]=[CH:13][CH:14]=[CH:15][C:4]=2[O:3]1

Participants

3

Reactant 2

HCID 962WaterHCID 898166H-Dibenz[c,e][1,2]oxaphosphorin, 6-chloro-

Product 1

HCID 37314CID 37314

Procedure

Another reference (German Offenlegungschrift 27 30 371, pp. 18 and 19) describes that 6-chloro-(6H)-dibenz-oxaphosphorin at 130° C. is combined with a large amount of water, the hydrolysis is carried out, the water is distilled off under reduced pressure and the 6-oxo-dibenzoxaphosphorin is then obtained. The operation described is technically very problematical and can hardly be carried out on a large scale, since water vaporizes at 130° C. and cools the reaction mixture. It is therefore necessary to work under elevated pressure if the temperature of 130° C. is to be maintained and thus uncontrolled crystallization is to be prevented, since the target compound melts significantly above the boiling point of water.

Workup

  1. customat 130° C.
  2. distillationthe water is distilled off under reduced pressure

Sources & evidence

ORD record
ord-05ef745298944b8a897414323264012a
Source dataset
uspto-grants-1998_02
Patent number
US05717127

Linked notes

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