Process for the preparation of phenylpropanones

Details Process for the preparation of phenylpropanones Process for the preparation of phenylpropanones

1986-10-17

1988-03-15

Reamer, James H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

549524, 549531, C07C 4558

Patent

active

047314826

ABSTRACT:
Process for the preparation of phenylpropanones having formula: ##STR1## R and R.sub.1, equal or different, being C.sub.1 -C.sub.4 alkyl groups or being coincident in the CH.sub.2 group of a heterocyclic ring, wherein the corresponding allylbenzenes are catalytically epoxidized by means of H.sub.2 O.sub.2, in a biphase system comprising an aqueous phase containing H.sub.2 O.sub.2 and an organic phase containing said allylbenzenes, a solvent immiscible with said aqueous phase and a catalyst having formula Q.sub.3 XW.sub.4 O.sub.24 (Q being a quaternary cation containing hydrocarbylic groups having on the whole from 20 to 70 C atoms, and X being P or As) and wherein the thus obtained epoxides are isomerized by heating at 90.degree.-150.degree. C., in the presence of catalytic amounts of LiI.

REFERENCES:
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patent: 3597459 (1971-08-01), Mimoun et al.
patent: 3855303 (1974-12-01), Bishop
patent: 4483997 (1984-11-01), McEntire et al.
patent: 4594439 (1986-06-01), Katsuki et al.
Venturello et al., J. Org. Chem., vol. 48, pp. 3831-3833 (1983).
Venturello et al., Chem. Abst., vol. 104, #27804z (1986).
Rickborn et al., J.A.C.S., vol. 90, pp. 4193-4194 (1968).

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