GB2368063A - 3-Aryl-5-substituted-3H-benzofuran-2-one derivatives and their use as stabilizers of organic material against degradation by light, oxygen or heat - Google Patents

3-Aryl-5-substituted-3H-benzofuran-2-one derivatives and their use as stabilizers of organic material against degradation by light, oxygen or heat Download PDF

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GB2368063A
GB2368063A GB0105372A GB0105372A GB2368063A GB 2368063 A GB2368063 A GB 2368063A GB 0105372 A GB0105372 A GB 0105372A GB 0105372 A GB0105372 A GB 0105372A GB 2368063 A GB2368063 A GB 2368063A
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group
substituted
c4alkyl
oxygen
phenylene
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GB0105372D0 (en
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Suruliappa Gowper Jeganathan
Stephane Biry
Peter Nesvadba
David George Leppard
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BASF Schweiz AG
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Ciba Spezialitaetenchemie Holding AG
Ciba SC Holding AG
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D307/00Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/77Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D307/78Benzo [b] furans; Hydrogenated benzo [b] furans
    • C07D307/82Benzo [b] furans; Hydrogenated benzo [b] furans with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to carbon atoms of the hetero ring
    • C07D307/83Oxygen atoms
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03CPHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C7/00Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • G03C7/30Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
    • G03C7/392Additives
    • G03C7/39208Organic compounds
    • G03C7/3924Heterocyclic
    • G03C7/39268Heterocyclic the nucleus containing only oxygen as hetero atoms

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  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Novel compounds of the formula V or VI <EMI ID=1.1 HE=86 WI=96 LX=599 LY=647 TI=CF> <PC>wherein<BR> R<SB>4</SB> is -(CH<SB>2</SB>)<SB>s</SB>-COR'<SB>15</SB> or -CH(CH<SB>3</SB>)-COR<SB>15</SB> or -C<SB>t</SB>H<SB>2t</SB>-COR<SB>15</SB>, wherein C<SB>t</SB>H<SB>2t</SB> is a straight chain or branched alkylene moiety; or R<SB>4</SB> is -O-(C<SB>v</SB>H<SB>2v</SB>)-COR<SB>15</SB>; -O-(CH<SB>2</SB>)<SB>q</SB>-OR<SB>32</SB>;<BR> -OCH<SB>2</SB>-CH(OH)-CH<SB>2</SB>-R<SB>15</SB>; or -OCH<SB>2</SB>-CH(OH)-CH<SB>2</SB>-OR<SB>32</SB>;<BR> R'<SB>7</SB> is C<SB>1</SB>-C<SB>4</SB>alkyl and R'<SB>8</SB> is hydrogen or C<SB>1</SB>-C<SB>4</SB>alkyl; and the remaining residues are as defined in claim 1 (and further remaining residues are as defined in GB 2343007), can be used as additives, for example as dye stabilizer, as scavengers for oxidised developers, or as an antioxidant or stabilizer for organic materials against degradation by light, oxygen and/or heat.

Description

Colour Photographic Material The present invention relates to colour photographic material comprising a certain lactone (benzofuran-2-one) type compound, to the use of this compound as an additive to photographic material, especially as scavenger for the oxidised form of the developer (Doxscavenger), to some new compounds of the benzofuran-2-one class, and their use as stabilisers for organic material against oxidative, thermal and/or light-induced degradation.
It is well known that one of the problems associated with colour photography is the diffusion of the oxidised colour developer away from the light sensitive silver halide emulsion layer in which it is formed into another silver halide emulsion layer, which can result in the formation of unwanted dyes at undesired places. For instance, while being generated in the green sensitive layer and forming a magenta dye through a coupling reaction with the incorporated magenta coupler, the oxidised developer can also diffuse to the red sensitive layer thereby producing unwanted cyan dye or to the blue sensitive layer thereby producing unwanted yellow dye. This kind of colour formation in the wrong layers will damage the colour balance of the photographic image and thus result in poor colour reproduction. One way of circumventing this problem is to incorporate oxidised developer scavengers in interlayers between the light sensitive silver halide emulsion layers. These scavengers should have additional properties such as low tendency to migrate, good stability towards aerial oxidation and high solublity in photographic oils.
Several classes of compounds that are useful as scavengers for oxidised developers are known in literature, e. g. specific derivatives of hydroquinone (EP-A-560198), or compounds of the classes sulphonamidophenol, gallic acid, resorcinol, catechol, aminophenol or aminonaphthol ; or natural antioxidants such as vitamin E or vitamin C.
Some compounds of the class benzofuran-2-one are described in US-4611016 or US5814692 and publications cited therein. Photographic material containing a certain type of benzofuran-2-one is mentioned in US-3615521 (use as precursor of photographic developing agent) and in US-4366240 (hydroxy substituted compounds as electron donor precursors for reducible colour providing compounds). EP-A-871066 mentions the use of a symmetrically substituted 3- (2-hydroxyphenyl)-benzofuran-2-one in the interlayer of a colour photographic material.
It has now been found that certain compounds of the 3-aryl-benzofuran-2-one class are especially useful as additives to photographic material. They are effective in a number of applications and find utility, for example, as scavengers for the oxidised developer (also termed hereafter Dox scavengers), as dye stabilisera, as antioxidants or as antifoggants.
Liquid compounds of the below formula I can also be used as a photographic oil. These compounds are especially stable towards aerial oxidation, diffusion fast and also exhibit a good solubility in high boiling photographic oils. They are well suited for use in photographic elements containing pyrazolotriazole couplers as magenta dye providing compounds, since they are harmless to the light fastness of magenta images obtained from such pyrazolotriazole couplers.
This invention pertains to a compound of the formula V or VI
wherein R4 is- (CH2) s-COR'1g or-CH (CH3)-COR15 or -CtH2t-COR15, wherein CtH2t is a straight chain or branched alkylene moiety ; or R4 is -O-("CvH2v)-COR15; -O-(CH2) q-OR32;
-OCH2-CH (OH)-CH2-R, 5 ; or-OCH2-CH (OH)-CH2-OR32 ; R'7 is C1-C4alkyl and R'8 is hydrogen or Ci4alkyl ;
R, 5 is hydroxy ;-o'- -M ; Ci-C2oalkoxy ; C3-C2oalkoxy interrupted by 0 and/or roxy ; I-0 r
substituted by a radical selected from OH, phenoxy, C7-C5a) ky) phenoxy, Cy
R24 C, salkoxyphenoxy ; or R,g is Cs-Ci2cycloalkoxy ; C7-Cphenylalkoxy ; phenoxy ;-N ; R25 R25
or a group of formula Tilla or Ifb ; R'15 is C3-C20alkoxy interrupted by 0 and/or substituted by a radical selected from OH, phenoxy, CT-Cisafkytphenoxy, C7-C1salkoxyphenoxy ; or R15 is Cs-Ccyctoatkoxy ; C7 C17phenylalkoxy ; phenoxy; or a group of formula Ila or Iflb ; R32 is C1-C18-alkanoyl ; Ci-Cgaikanoy) substituted by phenyl or C7-Ci5alkylphenyl ; C3 C18alkenoyl ; cyclohexylcarbonyl ; or naphthylcarbonyl ; L is a linking group of valency (k+1) and L is as a divalent group -O-; Q-C2-C12alkylene-Q; -O-CH2(OH)-CH2-O-; -Q-C2-C12alkylene-Q-CO-CvH2v-O-; -O-C2-C12alkylene-O-CH2-CH(OH)-CH2-O-; Q-interrupted Q-C4-C12alkylene-Q ; Q-phenylene-Q or Q-phenylene-D-phenylene-Q with D being Ci- C4alkylene, O, S, SO or S02 ; L as a trivalent group is Q-capped C3-C12 alkenetriyl, a trivalent residue of a hexose or a hexitol, or a group (-O-CH2)3C-CH2OH; -Q-CaH2a-N(CbH2b-Q-)-CcH2c-Q-;
- Q-C3-C12alkanetriyl (-Q-CO-CvH2v-O-) 2 ; - 0-C3-C12alkanetriyl (-O-CH2-CH (OH)-CH2-O-) 2 ; and L as a tetravalent group is a tetravalent residue of a hexose or a hexitol ; - Q-C4-C12alkanetetryl (-Q-CO-CvH2v-O-) 3 ; - 0-C4-C12alkanetetryl (-0-CH2-CH (OH)-CH2-O-) 3 ; Q-capped C4-C12alkanetetryl ; a group
v is 1,2, 3,4, 5,6, 7 or 8, preferably 1 or 2; Q is oxygen or-NH-, Z is a linking group of valency (k+1) and is as a divalent group C2-C12alkylene, Q-interrupted
C4-C12alkylene, phenylene or phenylene-D-phenylene with D being Ci4alkylene, 0, S, SO or 802 ; Z as a trivalent group is C3-Calkanetriyi, a trivalent residue of a hexose or a hexitol, a group (-CH2) aC-CH20H, or a group-CaH2a-N (CbH2b-)-CcH2c. ; and Z as a tetravalent group is a tetravalent residue of a hexose or a hexitol, C4-C12alkanetetryl,
a, b, c and k independently are 1,2 or 3, m is 0 or a number from the range 1-12, preferably 1-6, s is 1 or 2, and t is a number from the range 3-12, preferably 3-6; and all other residues are as defined for formula I if n is 1.
Preferred are compounds of formula V, wherein R3 and R5 are Hand R2 is C1-C8alkyl, especially tert. butyl or tert. pentyl. Where Rig or R'15 contains a group of formula ilia or Illb (di-, tri-or tetrameric benzofuranones of formula V), those compounds having symmetrical linking moieties are preferred.
Preferred compounds of the formula V) are those wherein R'7 is methyl or isopropyl and R'8 is hydrogen or methyl.
Compounds of the formulae V and VI are useful as stabilisers for organic material against degradation by light, oxygen and/or heat. Application of these compounds and methods of stabilising are generally as described in GB-A-2322861; examples for organic material which can be stabilized are listed, for example, in GB-A-2319523 from page 15, line 11, until page 20, line 25; possible costabilizers are as listed, for example, in GB-A-2319523 from page 21, line 16, until page 32, bottom line. Examples for organic materials which can be stabilized as well as methods of stabilization are also listed in US-5668200, from column 8, line 18, to column 11, line 25, and from column 18, line 29, to column 22, line 53, and additionally in column 25, lines 29-67; possible costabilizers and their dosage are as listed in US-5668200, column 11, line 51, to column 18, line 28, and column 22, line 54, to column 25, line 28, and in column 26, lines 9-15; these passages of US-5668200 are hereby incorporated by reference. Compounds of the formula V or V) are used for this application preferably in an amount of 0.0005 to 5%, especially 0.01 to 1%, based on the weight of the organic material to be stabilised. The invention also pertains to a composition comprising (a) an organic material which may be subject to degradation by light, oxygen and/or heat, and (b) as stabilizer against these harmful effects a compound of the formula V and/or VI. Most preferred organic materials to be stabilized are synthetic organic polymers and organic dyes, especially thermoplastic polymers such as polyolefin, photographic or materials or coating materials.
Halogen is typically chloro, bromo or iodo. Chloro is preferred.
Alkanol of up to 25 carbon atoms is a branched or unbranched radical, typically formyl, ace
tyl, propionyl, butanoyl, pentanoyl, hexanoyl, heptanoyl, octanoyl, nonanoyl, decanoyl, undecanoyl, dodecanoyl, tridecanoyl, tetradecanoyl, pentadecanoyl, hexadecanoyl, heptadecano yl, octadecanoyl, eicosanoyl or docosanoyl. Alkanol of 2 to 18, in particular of 2 to 12, e. g. of 2 to 6, carbon atoms is preferred. Acetyl is particularly preferred. C2-C2sAtkanoyl which is
substituted by a di (Ci-C6alkyl) phosphonate group is typica) ! y (CH3CH20) 2POCH2CO-, (CH30) 2POCHzCO-, (CH3CH2CH2CH20) 2POCH2CO-, (CH3CH20) 2POCH2CH2CO-, (CH30) 2POCH2CH2CO-, (CH3CH2CH2CH20) 2POCH2CH2CO-, (CH3CH20) 2PO (CH2) 4CO-, (CH3CH20) 2PO (CH2) aCO-or (CH3CH20) 2PO (CH2) 17CO-. C3-C2sAlkanoyi which is interrupted
by oxygen, sulfur or N-R14 is typically CH3-O-CH2CO-, CH3-S-CH2CO-,
CH3-NH-CH2CO-, CH3-N (CH3)-CH2CO-, CH3-O-CH2CH2-O-CH2CO-, CH3- (O-CH2CH2-) 20-CH2CO-, CH3- (O-CH2CH2-)aO-CH2CO-or CHsO-CH2CH2-)O-CH2CO-. Alkanoyloxy is oxygen-capped alkanol ; preferences are mainly as can be derived from alkanol above.
Alkenyl of 3 to 25 carbon atoms is a branched or unbranched radical, typically propenoyl, 2butenoyl, 3-butenoyl, isobutenoyl, n-2, 4-pentadienoyl, 3-methyl-2-butenoyl, n-2-octenoyl, n2-dodecenoyl, isododecenoyl, oleoyl, n-2-octadecenoyl or n-4-octadecenoyl. Alkenyl of 3 to 18, preferably of 3 to 12, e. g. of 3 to 6, most preferably of 3 to 4, carbon atoms is preferred.
C3-C2sAikenoyl which is interrupted by oxygen, sulfur or N-R14 is typically
CH3OCH2CH2CH=CHCO-or CH3OCH2CH2OCH=CHCO-.
Alkenoyloxy is oxygen-capped alkenyl ; preferences are mainly as can be derived from alkenyl above.
C6-CgCydoalkylcarbonyl is typically cyclohexylcarbonyl, cycloheptylcarbonyl or cyclooctylcafbony\. Cyclohexylcarbonyl is preferred. Cg-CgCycloalkyicarbonyloxy is oxygen-capped cycloalkylcarbonoyl ; preferences are analogous.
C1-C12Alkyl-substituted benzoyl which preferably carries 1 to 3, more preferably 1 or 2, alkyl groups is typically o-, m-or p-methylbenzoyl, 2, 3-dimethylbenzoyl, 2, 4-dimethylbenzoyl, 2, 5dimethylbenzoyl, 2, 6-dimethylbenzoyl, 3, 4-dimethylbenzoyl, 3,5-dimethylbenzoyl, 2-methyl-6 ethylbenzoyl, 4-tert-butylbenzoyl, 2-ethylbenzoyl, 2,4, 6-trimethylbenzoyl, 2, 6-dimethyl-4-tert- butylbenzoyl or 3, 5-di-tert-butylbenzoyl. Preferred substituents are CrCga ! kyt, in particular C1-C4alkyl, C1-Ci2Alkyl-substituted benzoyloxy which preferably carries 1 to 3, more preferably 1 or 2,
alkyl groups is typically o-, m-or p-methylbenzoyloxy, 2, 3-dimethylbenzoyloxy, 2, 4-dimethylbenzoyloxy, 2, S-dimethylbenzoyloxy, 2, 6-dimethylbenzoyloxy, 3, 4-dimethylbenzoyloxy, 3, 5dimethylbenzoyloxy, 2-methyl-6-ethylbenzoyloxy, 4-tert-butylbenzoyloxy, 2-ethylbenzoyloxy, 2, 4, 6-trimethylbenzoyloxy, 2, 6-dimethyl-4-tert-butylbenzoyloxy or 3, 5-di-tert-butylbenzoyloxy.
Preferred substituents are Ci-Cgaiky), in particular C1-C4alky\. Alkyl of up to 25 carbon atoms is a branched or unbranched radical, such as methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, 2-ethylbutyl, n-pentyl, isopentyl, 1methylpentyl, 1, 3-dimethylbutyl, n-hexyl, 1-methylhexyl, n-heptyl, isoheptyl, 1,1, 3,3-tetramethylbutyl, 1-methylheptyl, 3-methylheptyl, n-octyl, 2-ethylhexyl, 1,1, 3-trimethylhexyl, 1,1, 3, 3-tetramethylpentyl, nonyl, decyl, undecyl, 1-methylundecyl, dodecyl, 1,1, 3,3, 5, 5-hexamethylhexyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, eicosyl or docosyl. One of the preferred meanings of R2 and R4 is, for example, Cl-C, 8alkyl. A particularly preferred meaning of R4 is CrC4alkyL One of R2 and R4 is preferably a branched radical ; especially preferred are both R2 and R4 branched radicals.
Alkenyl of 3 to 25 carbon atoms is a branched or unbranched radical, such as propenyl, 2butenyl, 3-butenyl, isobutenyl, n-2, 4-pentadienyl, 3-methyl-2-butenyl, n-2-octenyl, n-2-dodecenyl, isododecenyl, oleyl, n-2-octadecenyl or n-4-octadecenyl. Alkenyl of 3 to 18, preferably of 3 to 12, e. g. of 3 to 6, in particular of 3 to 4, carbon atoms is preferred.
Alkenyloxy is oxygen capped alkenyl ; preferences are analogous.
Alkynyl of 3 to 25 carbon atoms is a branched or unbranched radical, such as propynyl (-CH2 CECH), 2-butynyl, 3-butynyl, n-2-octynyl, or n-2-dodecynyl. Alkynyl of 3 to 18, preferably of 3 to 12, e. g. of 3 to 6, in particular of 3 to 4 carbon atoms is preferred.
Preferences for alkynyloxy (oxygen capped alkynyl) are analogous.
C2-C25AIkyl which is interrupted by oxygen, sulfur or 1\ N-Rl4 is typically
CH3-O-CH2-, CH3-S-CH2-, CH3-NH-CH2-, CH3-N (CH3)-CH2-, CH3-O-CH2CH2-O-CH2-, CH3- (O-CH2CH2-) 2-0-CH2-, CH3- (O-CH2CH2-) 30-CH2- or CH3- (O-CH2CH2-) 40-CH2-.
C7-CgPhenylalkyl is typically benzyl, a-methylbenzyl, a, a-dimethylbenzyl or 2-phenylethyl.
Benzyl and a, a-dimethylbenzyl are preferred.
C7-CgPhenylalkyl which is unsubstituted or substituted at the phenyl moiety by 1 to 3 Ci-C4- alkyl is typically benzyl, a-methylbenzyl, a, a-dimethylbenzyl, 2-phenylethyl, 2-methylbenzyl, 3-methylbenzyl, 4-methylbenzyl, 2, 4-dimethylbenzyl, 2, 6-dimethylbenzyl or 4-tert-butylbenzyl.
Benzyl is preferred.
Cy-C2sPhenylalkyl which is interrupted by oxygen, sulfur or N-R and which is unsub
stituted or substituted at the phenyl moiety by 1 to 3 C-C4alkyl is a branched or unbranched radical, such as phenoxymethyl, 2-methylphenoxymethyl, 3-methyl-phenoxymethyl, 4-me thylphenoxymethyl, 2, 4-di methylphenoxym ethyl, 2, 3-dimethylphenoxymethyl, phenylthiome- thy !, N-methyl-N-phenyl-methyl, N-ethyl-N-phenylmethyl, 4-tert-butylphenoxymethyl, 4-tert butylphenoxyethoxymethyl, 2, 4-di-tert-butylphenoxymethyl, 2, 4-di-tert-butylphenoxyethoxymethyl, phenoxyethoxyethoxyethoxymethyl, benzyloxymethyl, benzyloxyethoxymethyl, N
benzyl-N-ethylmethyl or N-benzyl-N-isopropylmethyl.
C7-C9Phenylalkoxy is typically benzyloxy, a-methylbenzyloxy, a, a-dimethylbenzyloxy or 2 phenylethoxy. Benzyloxy is preferred.
C1-C4Alkyl-substituted phenyl which preferably contains 1 to 3, in particular 1 or 2, alkyl groups is typically o-, m-or p-methylphenyl, 2, 3-dimethylphenyl, 2, 4-dimethylphenyl, 2,5-dimethylphenyl, 2, 6-dimethylphenyl, 3, 4-dimethylphenyl, 3, 5-dimethylphenyl, 2-methyl-6-ethyl- phenyl, 4-tert-butylphenyl, 2-ethylphenyl or 2, 6-diethylphenyl.
CrC4Alkyl-substituted phenoxy which preferably contains 1 to 3, in particular 1 or 2, alkyl
groups is typically o-, m-or p-methylphenoxy, 2, 3-dimethylphenoxy, 2, 4-dimethylphenoxy, 2, 5-dimethylphenoxy, 2, 6-dimethylphenoxy, 3, 4-dimethylphenoxy, 3, 5-dimethylphenoxy, 2methyl-6-ethylphenoxy, 4-tert-butylphenoxy, 2-ethylphenoxy or 2, 6-diethytphenoxy.
Unsubstituted or C1-C4alkyl-substituted Cs-Cgcycloalkyl is, for example, cyclopentyl, methyl cyclopentyl, dimethylcyclopentyl, cyclohexyl, methylcyclohexyl, dimethylcyclohexyl, trimethyl- cyclohexyl, tert-butylcyclohexyl, cycloheptyl or cyclooctyl. Cyclohexyl and tert-butylcyclohexyl are preferred.
Unsubstituted or C1-C4alkyl-substituted C5-C8cycloalkoxy is, for example, cyclopentoxy, me
thylcyclopentoxy, dimethylcyclopentoxy, cyclohexoxy, methylcyclohexoxy, dimethylcyclohex oxy, trimethylcyclohexoxy, tert-butylcyclohexoxy, cycloheptoxy or cyclooctoxy. Cyclohexoxy and tert-butylcyclohexoxy are preferred.
Alkoxy of up to 25 carbon atoms is a branched or unbranched radical, such as methoxy, ethoxy, propoxy, isopropoxy, n-butoxy, isobutoxy, pentoxy, isopentoxy, hexoxy, heptoxy, octoxy, decyloxy, tetradecyloxy, hexadecyloxy or octadecyloxy. Alkoxy of 1 to 12, in particular of 1 to 8, e. g. of 1 to 6, carbon atoms is preferred.
Cs-CzsAikoxy which is interrupted by oxygen, sulfur or N-R14 is typically
CH3-O-CH2CH2O-, CH3-S-CH2CH2O-, CH3-NH-CH2CH2O-, CH3-N (CH3)-CH2CH20-, CH3-0-CH2CH2-0-CH2CH20-, CH3- (O-CH2CH2-) 20-CH2CH20-, CH3- (0-CH2CH2-) 30-CH2CH20-or CH3- (O-CH2CH2-) 40-CH2CH20-.
Alkylthio of up to 25 carbon atoms is a branched or unbranched radical, such as methylthio, ethylthio, propylthio, isopropylthio, n-butylthio, isobutylthio, pentylthio, isopentylthio, hexylthio, heptylthio, octylthio, decylthio, tetradecylthio, hexadecylthio or octadecylthio. Alkylthio of 1 to 12, in particular of 1 to 8, e. g. of 1 to 6 carbon atoms is preferred.
Alkylamino of up to 4 carbon atoms is a branched or unbranched radical, such as methyl amino, ethylamino, propylamino, isopropylamino, n-butylamino, isobutylamino or tert-butyl- amino.
Di (C1-C4alkyl) amino also means that the two radicals are independently of the other bran
ched or unbranched, such as dimethylamin, methylethylamino, diethylamino, methyl-n-propylamino, methylisopropylamino, methyl-n-butylamino, methylisobutylamino, ethylisopropylamino, ethyl-n-butylamino, ethylisobutylamino, ethyl-tert-butylamino, diethylamino, diisopro pylamino, isopropyl-n-butylamino, isopropylisobutylamino, di-n-butylamino or di-isobutyl- amino.
Alkanoylamino of up to 25 carbon atoms is a branched or unbranched radical, such as formylamino, acetylamino, propionylamino, butanoylamino, pentanoylamino, hexanoylamino, heptanoylamino, octanoylamino, nonanoylamino, decanoylamino, undecanoylamino, dodecanoylamino, tridecanoylamino, tetradecanoylamino, pentadecanoylamino, hexadecanoylamino, heptadecanoylamino, octadecanoyamino, eicosanoylamino or docsanoylamino.
Alkanoylamino of 2 to 18, in particular of 2 to 12, e. g. of 2 to 6, carbon atoms is preferred.
C1-ClsAlkylene is a branched or unbranched radical, such as methylene, ethylene, propy lene, trimethylene, tetramethylene, pentamethylene, hexamethylene, heptamethylene, octa
methylene, decamethylene, dodecamethylene or octadecamethylene. C1-Ci2Alkylene and, in particular, Ci-Csalkylene are preferred.
A C1-C4Alkyl-substituted C5-C12cycloalkylene ring which preferably contains 1 to 3, in particular 1 or 2, branched or unbranched alkyl groups is typically cyclopentylene, methylcyclo- pentylene, dimethylcyclopentylene, cyclohexylene, methylcyclohexylene, dimethylcyclohexy-
lene, trimethylcyclohexylene, tert-butylcyclohexylene, cycloheptylene, cyclooctylene or cyclodecylene. Cyclohexylen and tert-butylcyclohexylene are preferred.
C2-CisAlkylene which is interrupted by oxygen, sulfur or N-R is, for example,
- CH2-0-CH2-,-CH2-S-CH2-,-CH2-NH-CH2-,-CH2-N (CH3)-CH2-,-CH2-O-CH2CH2-O-CH2-, -CH2- (O-CH2CH2-) 20-CH2-,-CH2- (O-CH2CH2-) 30-CH2-,-CH2- (O-CH2CH2-) 40-CH2- or - Cn2Cn2-S-Cn2Cn2''' C2-C18Alkenylene is typically vinylene, methylvinylene, octenylethylene or dodecenylethylene.
C2-CaAlkenylene is preferred.
Alkylidene of 2 to 20 carbon atoms is, for example, ethylidene, propylidene, butylidene, pentylidene, 4-methylpentylidene, heptylidene, nonylidene, tridecylidene, nonadecylidene, 1-methylethylidene, 1-ethylpropylidene or 1-ethylpentylidene. C2-C8Alkylidene is preferred.
Phenylalkylidene of 7 to 20 carbon atoms is typically benzylidene, 2-ph enyl ethyl iden e or 1 phenyl-2-hexylidene. C7-CgPhenylalkylidene is preferred.
C5-C8Cycloalkylene is a saturated hydrocarbon group having two free valencies and at least one ring unit and is typically cyclopentylene, cyclohexylene, cycloheptylene or cyclooctylene.
Cyclohexylene is preferred.
C7-C8Bicycloalkylene is typically bicycloheptylene or bicyclooctylene.
Unsubstituted or C1-C4alkyl-substituted phenylene or naphthylene is typically 1,2-, 1,3-, 1,4phenylene, 1,2-, 1,3-, 1,4-, 1,6-, 1,7-, 2, 6- 2, 7-naphthylene. 1, 4-Phenylene is preferred.
A Ci-C4alkyl-substituted C5-C8cycloalkylidene ring which preferably contains 1 to 3, in parti cular 1 or 2, branched or unbranched alkyl groups is typically cyclopentylidene, methylcyclo
pentylidene, dimethylcyclopentylidene, cyclohexylidene, methylcyclohexylidene, dimethylcyclohexylidene, trimethyfcyclohexylidene, tert-butylcyclohexylidene, cycloheptylidene or cyclooctylidene. Cyclohexyliden and tert-butylcyclohexylidene are preferred.
A mono-, di-or tri-valent metal cation is preferably an alkali metal cation, alkaline earth metal cation or aluminium cation, typically Na+, K+, Mg++, Ca++ or Al+++.
Compounds of the formula V and V) can be obtained in analogy to methods known in the art, e. g. as described in US-5814692 or publications cited therein.
Examples for compounds of the formula V or VI of the invention are :
Compound 19 :
Compound 20 :
Compound 22 :
Compound 23 a) :
Compound 26 a) :
Compound 29 :
Compound 30 :
Compound 31 :
Compound 32 :
These products may additionally contain minor amounts of other structural isomers in accordance with the substitution at the phenyl ring in 3-position of the benzofuran-2-one.
The synthetic methods used for the preparation of the benzofuran-2-ones shown above are described e. g. in US Patents Nos. 5,607, 624 and 5,814, 692. Examples for the synthesis of some new compounds among the above are given below from example 8 onwards.
Percentages given in the following examples are by weight if not otherwise indicated. Room temperature denotes a temperature in the range 20-25OC.
Frequent abbreviations used are: TCP tricresyl phosphate; RH relative humidity; m. p. melting point or range; NMR nuclear magnetic resonance of'H.
Synthesis of new compounds Example 8: 5, 7-Di-tert-pentyl-3 (4-isopropylphenyl)-3H-benzofuran-2-one (compound No. 26) a) 2, 6-Di-tert-pentylphenol (161.4 g), glyoxylic acid (122.3 g of the 50% b. w. solution in water) and 1.3 g of p-toluene sulphonic acid are heated in 500 ml of ethylenechloride under nitrogen at reflux temperature in an apparatus designed for the removal of water.
After 3.5 hours the reaction mixture is cooled to room temperature, washed 3 times with 25 mi water, dried over magnesium sulphite and evaporated under reduced pressure to give 214.3 g of: 5, 7-di-tert-pentyl-3-hydroxy-3H-benzofuran-2-one as an orange coloured oil. b) 29.6 g of the product obtained under (a) are heated together with cumane (150 mi) and an acid earth catalyst (Fulcat 22 B, supplied by Laport, GB) under nitrogen to reflux.
After 2 hours, the reaction mixture is filtered hot. Evaporation of the filtrate gives 35.1 g of raw product, which is subjected to chromatography on silica gel using hexane/ethyl acetate (4: 1) as eluant. 26.7 g of the title product (compound No. 26) are obtained as an orange coloured oil. NMR (CDCI3) 3-H: 5.29 ppm.
Example 9: Preparation of 7-isopropyl-5- (4-methoxycarbonyl-1, 1-dimethylbutyl)-3, 4 dimethylphenyl-3H-benzofuran-2-one (compound No. 23) a) 5-Methyl-5- (4-hydroxy-3-isopropyl phenyl)-hexanoic acid methyl ester (10. 0 g), glyoxylic acid (6.4 g of the 50 % solution in water) and p-toluene sulphonic acid (40 mg) are heated in 40 ml of ethylene chloride under nitrogen at reflux in an apparatus designed for the removal of water. After 5 hours the reaction mixture is cooled to room temperature,
washed two times with 25 ml water, dried over magnesium sulphate and evaporated under reduced pressure to give 13 g of 7-isopropyl-5- (4-methoxycarbonyl-1, 1 dimethylbutyl)-3-hydroxy-3H-benzofuran-2-one as a yellow oil. b) 13 g of the above product (a), o-xylene (50 ml) are heated together with an acid earth catalyst (see example 8b) under nitrogen at reflux for 2.5 hours. The reaction mixture is filtered hot and the filtrate evaporated to give 16.6 g of a yellow oil. This is chromatographed over silica gel using hexane/ethylacetate 20: 5 as eluant. 10.4 g of the
mixture of the 2 isomers 7-isopropyl-5- (4-methoxycarbonyl-1, 1-dimethylbutyl)-3, 4dimethytphenyl-3H-benzofuran-2-one and 7-isopropyl-5- (4-methoxycarbonyl-1, 1 dimethylbutyl)-3- (2, 3-dimethylphenyl)-3H-benzofuran-2-one as a slightly brown resin is obtained. NMR (CDCI3) 3-H: 4.80 ppm.
Example 10 : Preparation of 7-lsopropyl-5- (4-methoxycarbonyl-1, 1-dimethylbutyl)-3- (2. 5-dimethylphenyl)-3H-benzofuran-2-one (compound No. 22) The product obtained in example 9a (14.35 g), p-xylene (50 ml) and an acid earth catalyst (see example 8b) are treated as described in example 9b to give 9.52 g of the title product (compound No. 22) as a slightly orange resin. NMR (CDCI3) 3-H: 5.05 ppm.
Example 11: Preparation of compound No. 19 a) 3- (7-. tert.-Butyl-2-oxo-3-phenyl-2, 3-dihydro-benzofuran-5-yl)-propionic acid 122.3 g (0.55 mol) 3- (3-tert.-butyl-4-hydroxy-phenyl)-propionic acid (CAS Nr. 107551-67 7) and 92.1 g (0.61 mol) mandelic acid are melted together and then stirred under nitrogen at 200 Oc during 4 h. The mixture is then cooled to room temperature, dissolved in toluene and chromatographed on silica gel with dichloromethane-ethyl acetate (3: 1) to afford 103 g of the title compound as a pale yellow resin. 1H-NMR (100 MHz, CDCts) : 7.4 6.9 m (7 ArH), 4.83 s (1 H), 3.00-2. 54 m (4H), 1.42 s (t-Bu).
23.7 b) 23.7 g (0.07 mol) of the product from example 11 a, 4.2 g (0.035 mol) 1, 6-hexanediol and 0.3 g p-toluene sus phonic acid are refluxed in 250 ml of xylene under Dean-Stark water separator during 6 h. The mixture is then cooled to room temperature, washed with water, dried with MgSO4 and evaporated under vacuum. Chromatography of the residue on silica gel with dichloromethane-hexane (19: 1) affords the 14.8 g of the compound No.
19 as a pale yellow oil.'H-NMR (100 MHz, CDCb) : 7.4-6. 9 m (14 ArH), 4.82 s (2H), 4.08 3.96 m (4H), 2.98-2. 51 m (8H), 1.61-1. 26 m (4H), 1.42 s (t-Bu).
Example 12: Preparation of 7-tert. butyl-5- (2-methoxycarbonylethyl)-3- (2, 5-dimethyiphenyl)- 3H-benzofuran-2-one (compound No. 24) a) 3- (4-hydroxy-3-tert. butylphenyl) propionic acid methyl ester (10.0 g), glyoxylic acid (7.4 g of the 50 % solution in water) and p-toluene sulphonic acid (40 mg) are heated in 40 mi ethylene chloride under nitrogen at reflux for 3 hours distilling off all water present and formed during the reaction. The reaction mixture is washed with water, dried over magnesium sulphate and evaporated under reduced pressure to give 13.0 g of 7 tert. butyl-5- (2-methoxycarbonylethyl)-3-hydroxy-3H-benzofuran-2-one. b) b) 13 g of the product from the above example 12a, 50 ml of p-xylene and and an acid earth catalyst (see example 8b) are heated under nitrogen at reflux for 2.5 hours. The reaction mixture is filtered hot and the filtrate evaporated under reduced pressure to give 17.0 g of an orange oil. This is purified by column chromatography over 350 g silica gel using hexane/ethylacetate 4: 1 as eluant to give the title product, which solidifies after two days. Recrystallization from hexane gives a colourless solid, mp 800. NMR (CDCI3) 3 H: 4.98 ppm.
Example 13: Preparation of compound No. 29 a) 2.40 g 2- (3-tert. Butyl-4-hydroxyphenoxy)-acetic acid methyl ester is heated 8hrs. in 100ml toluene at reflux with 0.34g pentaerythritol in the pesence of 0. 1 g p toluenesulphonic acid. The resulting methanol is distilled off using a Hickmann apparatus.
The reaction mixture is cooled to room teperature, washed with water, dried over magnesium sulphate and evaporated under reduced pressure. The residue (2,24g) is treated with glyoxylic acid (1.62g of the 50% solution in water) and p. toluene sulphonic acid (0. 1 g) and heated in 20ml. ethylene chloride under nitrogen at reflux for 3.5hrs., distilling off all water present and formed during the reaction. The reaction mixture is washed wth water, dried over magnesium sulphate and evaporated under reduced pressure to give 2.80g of compound X of the formula :
b) 2. 8g Of the above compound X, 25mi. of cymene and an acid earth catalyst (see example 8b) are heated under nitrogen at reflux for 4hrs. The reaction mixture is filtered hot and the filtrate evaporated under reduced pressure to give 3.50g of impure product. This is purified by column chromatography over 160g silica gel using hexane/ethyl acetate 4: 1 as eluant to give purified compound No. 29 as a colourless resin.
Example 14 : Preparation of compound No. 30 a) 3. 50g 2- (3-tert-Butyl-4-hydroxyphenoxy)-propionic acid octyl ester is heated 3hrs. under nitrogen with glyoxylic acid (1. 62g of the 50% solution in water) and p-toluene sulphonic acid (0. 1 g) in 20ml ethylene chloride at reflux, distilling off the water present and formed during the reaction. The reaction mixture is washed with water, dried over magnesium sulphate and evaporated under reduced pressure to give 4. 05g of the below intermediate Xil as a colouriess oil :
b) 4. 05g of the above intermediate XII, 25mLcymene and an acid catalyst (see example 8b) are heated under nitrogen at reflux for 3 hrs. The reaction mixture is filtered hot and the filtrate evaporated under reduced pressure to give 4. 91 g of the title product X ! H. This is purified by column chromatography using 150g silica gel and hexane/ethyl acetate 4: 1 as eluant to give purified compound No. 30 as a colourless oil.
Example 15: Preparation of compound No. 31 a) 3.00g 1-Butoxy-2-hydroxy-3- (3-tert. butyl-4-hydroxyphenoxy)-propane is treated with glyoxylic acid (1. 62g of a 50% solution in water) and p-toluene sulphonic acid (0. 1 g) and heated in 20ml ethylene chloride under nitrogen at reflux for 2.5 hrs. , distilling off all the water present and formed during the reaction. The reaction mixture is washed with water, dried over magnesium sulphate and evaporated under reduced pressure to give 3.62 g of crude intermediate XIV :
b) This was heated under nitrogen with an acid catalyst (see example 8b) in 25ml refluxing tert. butylbenzene for 2.5hrs. The reaction mixture is filtered hot and the filtrate evaporated under reduced pressure. The residue is purified by column chromatography over 150g silica gel using hexane/ethylacetate 4: 1 as eluant to give compound No. 31 as a colourless oil.
Example 16: Preparation of compound No. 32 Proceeding as in example 15, but using 2. 92g of compound XVI of formula
in step (a) instead of 1-butoxy-2-hydroxy-3- (3-tert. butyl-4-hydroxyphenoxy)-propane one obtains compound No. 32 as a slightly yellow resin.

Claims (2)

Claims : 1. Compound of the formula V or VI wherein R4 is- (CH2) s-COR'1s or-CH (CH3)-COR15 5 or-CtH2t-COR15, wherein CtH2t is a straight chain or branched alkylen moiety ; or R4 is-0- (CvH2v)-COR15 ;-0- (CH2) q-OR32 ; - OCH2-CH (OH)-CH2-R1s ; or-OCH2-CH (OH)-CH2-OR32 ; R'7 is C1-C4alkyl and R'B is hydrogen or C1-C4alkyl ; R15 is hydrox-~LMr Cl-C20alkoxy ; C3-C20alkoxy interrupted by 0 and/or yi I-0 r +1 1 substituted by a radical selected from OH, phenoxy, C7-Cisa) kytphenoxy, C ? /R24 C15alkoxyphenoxy ; or Rig is Cg-Cizcydoatkoxy ; C7-Cphenylalkoxy ; phenoxy ;-N ; R25 or a group of formula Ilia or Illb ; R'15 is C3-C20alkoxy interrupted by 0 and/or substituted by a radical selected from OH, phenoxy, C7-C1galkylphenoxy, CrC1salkoxyphenoxy ; or R'15 is Cs-Ccycloalkoxy ; C7 C17phenylalkoxy ; phenoxy ; or a group of formulà Illa or Illb ; R32 is C1-C1galkanoyl ; C1-C8alkanoyl substituted by phenyl or Alkylphenyl ; C3 Cigafkenoyt ; cyclohexylcarbonyl ; or naphthylcarbonyl ; L is a linking group of valency (k+1) and is, as a divalent group, - 0- ; Q-C2-C12alkylene-Q ; -O-CH2-CH(OH)-CH2-O-; - Q-C2-Ci2alkylene-Q-CO-CvH2v-O- ; - 0-C2-Ci2alkylene-O-CH2-CH (OH)-CH2-0- ; Q-interrupted Q-C4-Ci2alkylene-Q ; Q-phenylene-Q or Q-phenylene-D-phhenylene-Q with D being C1-C4-alkylene, O, S, SO or S02 ; L, as a trivalent group, is Q-capped C3-C12alkanetriyl, a trivalent residue of a hexose or a hexitol, or a group (-O-CH2)3C-CH2OH; -Q-CaH2a-N(CbH2b-Q)-CcH2c-Q-; - Q-C3-Ci2alkanetriyl (-Q-CO-CvH2v-0-) 2 ; - 0-C3-Ci2alkanetriyl (-O-CH2-CH (OH)-CH2-O-) 2 ; and L, as a tetravalent group, is a tetravalent residue of a hexose or a hexitol ; - Q-C4-Ci2alkanetetryl (-Q-CO-CvH2v-0-) 3 ; -O-C4-C12alkanetetryl(-O-CH2-CH(OH)-CH2-O-)3 ; Q-capped C4-C1zalkanetetryl ; a group Q is oxygen or-NH-, Z is a linking group of valency (k+1) and is as a divalent group C2-Cl2alkylene, Q-interrupted C4-C12alkylene, phenylene or phenylene-D-phenylene with D being C1-C4alkylene, 0, S, SO or S02 ; Z, as a trivalent group, is C3-Calkanetriyl, a trivalent residue of a hexose or a hexitol, a group (-CH2) 3C-CH20H, or a group-CaH2a-N (CbH2b-)-CcH2c-; and Z, as a tetravalent group, is a tetravalent residue of a hexose or a hexitol, C4-C12alkanetetryl, a, b, c and k independently are 1,2 or 3, m is 0 or a number from the range 1-12, s is 1 or 2, and t is a number from the range 3-12, v is 1,2, 3,4, 5,6, 7 or 8; and all other residues are as defined in claim 1 for formula I if n is 1. 2. Process for stabilizing an organic material against deterioration by light, oxygen and/or heat, which process comprises incorporating a compound of the formula V and/or VI according to claim 1 as stabilizer into said organic material. 3. Use of a compound of the formula V and/or V) according to claim 1 as stabilizer for organic material against deterioration by light, oxygen and/or heat. Amendments to the claims have been filed as follows Claims : 1. Compound of the formula V or VI wherein R2 is H or C1-C20alkyl ; R3 is H or C1-C18alkyl ; R5 is H or C1-C18alkyl ; R4 is -(CH2)s-COR'15 or -CtH2t-COR15, wherein CtH2t is a straight chain or branched alkylene moiety; or R4 is -O-(CvH2v)-COR15; -O-(CH2)q-OR32 ; - OCH2-CH (OH)-CH2-Ri5 ; or-OCH2-CH (OH)-CH2-OR32 ; or R4 is-0- (CvH2v)-CO-Ci-C2oalkoxy or-OCH2-CH (OH)-CH2-C1-C20alkoxy ; R7 and Rg are each independently of one another hydrogen; halogen ; C1-C25alkyl ; C3-C25-alkenyl ; C3-C25alkynyl ; C7-C9phenylalkyl ; unsubstituted or C1-C4alkyl substituted phenyl ; unsubstituted or C1-C4alkyl-substituted C5-C8-cycloalkyl ; Ra, Rio and R11 independently are H, OH, chloro, C1-C1salkyl, C1-C18alkoxy, di (Ci C4alkyl) amino, C7-Cgphenylalkyl ; unsubstituted or C1-C4alkyl-substituted phenyl ; unsubstituted or C1-C4alkyl-substituted C5-C8cycloalkyl ; C2-C1salkanoyloxy, C3 Ci8-alkoxycarbonylalkoxy or R20 is hydrogen or C1-C4alkyl ; R21 is hydrogen ; unsubstituted or Ci-C4alkyl-substituted phenyl ; d-Cssatkyt ; C2-C25alkyl which is interrupted by oxygen, sulphur or"" C7-Cgphenylalkyl which is unsubstituted or substituted at the phenyl moiety by 1 to 3 C1-C4alkyl ; C7-C25phenylalkyl which is interrupted by oxygen, sulphur or N-ruz and which is unsubstituted or substituted at the phenyl moiety by
1 to 3 C1-C4alkyl ; or R20 and R21, together with the linking carbon atoms, form a C5-C12cycloalkylene ring which is unsubstituted or substituted by 1 to 3 C1-C4alkyl ; R14 is hydrogen or Ci-C8alkyl ; R22 is hydrogen or Ci-C4alkyl ; R23 is hydrogen ; C1-C25alkanoyl ; C3-C25alkenoyl ; C3-C25alkanoyl which is interrupted
by oxygen, sulphur or N-R14 ; C2-C25alkanoyl which is substituted by a 14 1
di (Ci-C6alkyl) phosphonate group ; Ce-Cgcydoatkytcarbonyt ; thenoyl ; furoyl ;
benzoyl or C1-C12alkyl-substituted benzoyl ;
with R26 is hydrogen or C1-C4alkyl ; R27 is a direct bond; C1-C18alkylene ; C2-C18alkylene which is interrupted by oxygen,
sulphur or'N-R14 ; C2-C18alkenylene ; C2-C20alkylidene ; C7-C20phenyl
alkyliden ; Cs-Cacycloalkylene ; C7-C8bicycloalkylene ; unsubstituted or
C1-C4alkyl-substituted phenylene ; or \ ; o s
R24 R28 ishydroxy,-o'-'-M). Ci-dsatkoxyor-N ; with R24 and R25 are 25
each independently of the other H orCl-Cl8alkyl, R29 is oxygen or-NH- ; R30 is C1-C18alkyl or phenyl ; especially wherein at least 2 of the residues R7, Ra, Rg, Rio. R11 are H; R'7 is C1-C4alkyl and R'8 is hydrogen or C1-C4alkyl ;
R15 is hydroxy, o'-L M, with M is an r-valent metal cation ; r is 1, 2 or 3 ; and I-r +1 1
C3-C20alkoxy interrupted by 0 and/or substituted by a radical selected from OH, phenoxy, Cy-Cisatkytphenoxy, C7-C15alkoxyphenoxy ; or
R24 R15 is C5-Ci2cyc) oa ! koxy ; Cy-Ci/phenytatkoxy ; phenoxy ;-nez ; with R24 and R25 R25
R25 independently are H or Cl-Clsalkyl ; or R15 is a group offormula Hlb ;
(filb) ; with Ri is a radical of formula 11
(il), wherein R7-11 is as defined above,
R'15 is C3-C2oalkoxy interrupted by 0 and/or substituted by a radical selected from OH, phenoxy, C7-C15alkylphenoxy, C7-Ci5alkoxyphenoxy ; or R'15 is C5-Ci2cydoatkoxy ; Cy-Ci/phenyiatkoxy ; phenoxy ; or a group of formula Ilia or Illb ; R32 is Ci-Cigatkanoy) ; C1-C8alkanoyl substituted by phenyl or C7-Ci5alkylphenyl ; C3-Ci8alkenoyl ; cyclohexylcarbonyl ; or naphthylcarbonyl ; L is a linking group of valency (k+1) and is, as a divalent group, - 0- ; Q-C2-C12alkylene-Q ; - 0-CH2-CH (OH)-CH2-0- ;
- Q-C2-C12alkylene-Q-CO-CvH2v-0- ; - 0-C2-Ci2alkylene-O-CH2-CH (OH)-CH2-0- ; Q-interrupted Q-C4-C12alkylene-Q ; Q-phenylene-Q or Q-phenylene-D-phenylene-Q with D being C1-C4alkylene, 0, S, SO or S02 ; L as a trivalent group, is Q-capped C3-C12alkanetriyl, a trivalent residue of a hexose or a hexitol, or a group (-0-CH2) 3C-CH20H ; - Q-CaH2a-N (CbH2b-Q-)-CcH2c-Q- ; - Q-C3-C12alkanetriyl (-Q-CO-CvH2v-0-) 2 ; - 0-C3-Ci2a) kanetriy) (-0-CH2-CH (OH)-CH2-0-) 2 ; and L as a tetravalent group, is a tetravalent residue of a hexose or a hexitol ; - Q-C4-C12alkanetetryl (-Q-CO-CvH2v-0-) 3 ; - 0-C4-C12alkanetetryl (-0-CH2-CH (OH)-CH2-0-) 3 ; Q-capped C4-C12alkanetetryl ;
Q is oxygen or-NH-,
2. Process for stabilizing an organic material against deterioration by light, oxygen and/or heat, which process comprises incorporating a compound of the formula V and/or VI according to claim 1 as stabilizer into said organic material.
2 is a linking group of valency (k+1) and is as a divalent group C-Calkylene, Qinterrupted C4-C4a ! kylene, phenylene or phenylene D-phenylene with D being 64 C4alkylene, 0, S, SO or SC) 2 ; Z, as a trivalent group, is Cs-Calkanetriyl, a trivalent residue of a hexose or a cw. hexite', a grgup (-..., 20 C o r a g Fe u p Z, as a tetravalent group, is a tetravalent residue of a hexose or a hexitol, C4s ICH2 H2 H2 H2 H2 CH, H2 H2 H2 H2 alkanetetryl, a 9. oF a group
a, b, c and k independently are 1, 2 or 3,
m is 0 or a number from the range 1 12, w yU q is 1,2, 3,4, 5 or 6; s is 1 or 2, and t is a number from the range 3-12, v is 1,2, 3,4, 5, 6, 7 or 8.
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2042562A (en) * 1979-02-05 1980-09-24 Sandoz Ltd Stabilising polymers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2042562A (en) * 1979-02-05 1980-09-24 Sandoz Ltd Stabilising polymers
US4611016A (en) * 1979-02-05 1986-09-09 Ciba-Geigy Corp. Benzofuranone or indolinone compounds useful as stabilizers for organic materials

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Indian J. Chem., Sect. B, 1980, Vol. 19B(10), pages 891-893 *

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