Janet Peterson

US Patent:

39391752, Feb 17, 1976

Filed:

May 14, 1974

Appl. No.:

5/469717

Inventors:

Andreas Schmidt - Reinach, CH
Janet B. Peterson - Yonkers NY
Martin Dexter - Briarcliff Manor NY

Assignee:

Ciba-Geigy Corporation - Ardsley NY

International Classification:

C07D 4932

US Classification:

2603095

Abstract:

New hydroxyphenylated hydantoins are useful as stabilizers for synthetic organic polymeric materials. The new hydroxyphenylated hydantoins may be additionally substituted in the 1,3 and/or 5 positions of the hydantoin ring. The hydroxyphenylated and 5-substituted hydroxyphenylated hydantoins are generally prepared by reacting hydroxyphenylated ketones or aldehydes with alkali cyanide and ammonium carbonate. Hydroxyphenylated hydantoins substituted in the 1 and/or 3 positions are generally prepared by reacting the 1 and/or 3-unsubstituted hydroxyphenylated hydantoins with the corresponding halogen or dialkylaminomethyl derivatives.

US Patent:

40440192, Aug 23, 1977

Filed:

Sep 17, 1975

Appl. No.:

5/614039

Inventors:

Andreas Schmidt - Reinach, CH
Janet B. Peterson - Yonkers NY
Martin Dexter - Briarcliff Manor NY

Assignee:

Ciba-Geigy Corporation - Ardsley NY

International Classification:

C07D23378

US Classification:

548313

Abstract:

New hydroxyphenylated hydantoins are useful as stabilizers for synthetic organic polymeric materials. The new hydroxyphenylated hydantoins may be additionally substituted in the 1,3 and/or 5 positions of the hydantoin ring. The hydroxyphenylated and 5-substituted hydroxyphenylated hydantoins are generally prepared by reacting hydroxyphenylated ketones or aldehydes with alkali cyanide and ammonium carbonate. Hydroxyphenylated hydantoins substituted in the 1 and/or 3 positions are generally prepared by reacting the 1 and/or 3-unsubstituted hydroxyphenylated hydantoins with the corresponding halogen or dialkylaminomethyl derivatives.

US Patent:

41287185, Dec 5, 1978

Filed:

Mar 17, 1977

Appl. No.:

5/778654

Inventors:

Andreas Schmidt - Reinach, CH
Janet B. Peterson - Yonkers NY
Martin Dexter - Briarcliff Manor NY

Assignee:

Ciba-Geigy Corporation - Ardsley NY

International Classification:

C07D23378
C07D23502

US Classification:

548313

Abstract:

New hydroxyphenylated hydantoins are useful as stabilizers for synthetic organic polymeric materials. The new hydroxyphenylated hydantoins may be additionally substituted in the 1,3 and/or 5 positions of the hydantoin ring. The hydroxyphenylated and 5-substituted hydroxyphenylated hydantoins are generally prepared by reacting hydroxphenylated ketones or aldehydes with alkali cyanide and ammonium carbonate. Hydroxyphenylated hydantoins substituted in the 1 and/or 3 positions are generally prepared by reacting the 1 and/or 3-unsubstituted hydroxyphenylated hydantoins with the corresponding halogen or dialkylaminomethyl derivatives.