Merocyanine derivatives

A method of protecting household products from photolytic and oxidative degradation by adding thereto the compounds of formula

• and/or its E/E-, E/Z- or Z/Z-geometrical isomer forms, wherein
• R′1 and R′2 independently of each other are hydrogen;
• C1-C22alkyl, C2-C22alkenyl, C2-C22alkinyl, which are optionally substituted by at least one hydroxy;
• or R1 and R2 together with the nitrogen atom linking them form a —(CH2)n— ring which is optionally interrupted by —O— or by —NH—;
• R′3 is a —(C═O)OR′6 group;
• or a —(CO)NHR′6 group;
• R′6 is C1-C22alkyl, C2-C22alkenyl, C2-C22alkinyl, C3-C22cycloalkyl or C3-C22cycloalkenyl, which is optionally substituted by one or more than one OH;
• R′4 and R′5 are hydrogen;
• or R′4 and R′5 form a —(CH2)n— ring which is optionally substituted by C1-C4alkyl and/or interrupted by —O— or by —NH—;
• n is a number from 2 to 7;
• R′7 and R′8 independently of each other are hydrogen;
• C1-C22alkyl, C2-C22alkenyl, C2-C22alkinyl, which is optionally interrupted by one or more than one O and/or substituted by one or more than one OH;
• or
• R′7 and R′8 together with the nitrogen atom linking them form a —(CH2)n— ring which is optionally interrupted by —O—;
• R′9 and R′10 are hydrogen;
• or R′9 and R′10 form a —(CH2)n— ring which is optionally substituted by C1-C4alkyl and/or interrupted by —O— or by —NH—;
• A is —O—;
• or —NH;
• R′11 is C1-C22alkyl, C2-C22alkenyl, C2-C22alkinyl, C3-C22cycloalkyl or C3-C22cycloalkenyl, which is optionally interrupted by one or more than one O.

A method of protecting UV-A sensitive drugs from photo-degradation by incorporation of the UV absorber of formula (1′) or formula (2′)

• and/or its E/E-, E/Z- or Z/Z-geometrical isomer forms, wherein
• R′1 and R′2 independently of each other are hydrogen;
• C1-C22alkyl, C2-C22alkenyl, C2-C22alkinyl, which are optionally substituted by at least one hydroxy;
• or R1 and R2 together with the nitrogen atom linking them form a —(CH2)n— ring which is optionally interrupted by —O— or by —NH—;
• R′3 is a —(C═O)OR′6 group;
• or a —(CO)NHR′6 group;
• R′6 is C1-C22alkyl, C2-C22alkenyl, C2-C22alkinyl, C3-C22cycloalkyl or C3-C22cycloalkenyl, which is optionally substituted by one or more than one OH;
• R′4 and R′5 are hydrogen;
• or R′4 and R′5 form a —(CH2)n— ring which is optionally substituted by C1-C4 alkyl and/or interrupted by —O— or by —NH—;
• n is a number from 2 to 7;
• R′7 and R′8 independently of each other are hydrogen;
• C1-C22alkyl, C2-C22alkenyl, C2-C22alkinyl, which is optionally interrupted by one or more than one O and/or substituted by one or more than one OH;
• or R′7 and R′8 together with the nitrogen atom linking them form a —(CH2)n— ring which is optionally interrupted by —O—;
• R′9 and R′10 are hydrogen;
• or R′9 and R′10 form a —(CH2)n— ring which is optionally substituted by C1-C4alkyl and/or interrupted by —O— or by —NH—;
• A is —O—;
• or —NH;
• R′11 is C1-C22alkyl, C2-C22alkenyl, C2-C22alkinyl, C3-C22cycloalkyl or C3-C22cycloalkenyl, which is optionally interrupted by one or more than one O
• into transparent blister foils or transparent pharmacy containers.

A method of protecting the ingredients in agriculture applications by adding thereto the compounds of formula (1′) or (2′)

• and/or its E/E-, E/Z- or Z/Z-geometrical isomer forms, wherein
• R′1 and R′2 independently of each other are hydrogen;
• C1-C22alkyl, C2-C22alkenyl, C2-C22alkinyl, which are optionally substituted by at least one hydroxy;
• or R1 and R2 together with the nitrogen atom linking them form a —(CH2)n— ring which is optionally interrupted by —O— or by —NH—;
• R′3 is a —(C═O)OR′6 group;
• or a —(CO)NHR′6 group;
• R′6 is C1-C22alkyl, C2-C22alkenyl, C2-C22alkinyl, C3-C22cycloalkyl or C3-C22cycloalkenyl, which is optionally substituted by one or more than one OH;
• R′4 and R′5 are hydrogen;
• or R′4 and R′5 form a —(CH2)n— ring which is optionally substituted by C1-C4alkyl and/or interrupted by —O— or by —NH—;
• n is a number from 2 to 7;
• R′7 and R′8 independently of each other are hydrogen;
• C1-C22alkyl, C2-C22alkenyl, C2-C22alkinyl, which is optionally interrupted by one or more than one O and/or substituted by one or more than one OH;
• or R′7 and R′8 together with the nitrogen atom linking them form a —(CH2)n— ring which is optionally interrupted by —O—;
• R′9 and R′10 are hydrogen;
• or R′9 and R′10 form a —(CH2)n— ring which is optionally substituted by C1-C4alkyl and/or interrupted by —O— or by —NH—;
• A is —O—;
• or —NH;
• R′11 is C1-C22alkyl, C2-C22alkenyl, C2-C22alkinyl, C3-C22cycloalkyl or C3-C22cycloalkenyl, which is optionally interrupted by one or more than one O.