85224-85-7

Upstream product

• 32853-30-8 Methyl 5-methyl-5-hexenoate 
• 104-15-4 toluene-4-sulfonic acid 

Downstream Products

• 89644-66-6 2,5-bis-(5'-methoxycarbonyl-2'-methyl-pent-2'-yl)-1,4-benzoquinone 

Relevant academic research and scientific papers

Hydroquinones

New hydroquinones have the formula: STR1 wherein p is 1 or 2 and q is 0 or 1, provided that p+q is 1 or 2; R is a residue of formula: STR2 wherein Q is (i) -OX or (ii) -PO(OR11)((O)x R11); and salts thereof with organic or inorganic acid bases. The groups X and R11 and x are defined hereinafter. The compounds of formula I are useful as stabilisers in photographic materials.

Benzo-1,4-quinones

New benzo-1,4-quinones and salts thereof with organic or inorganic acid and bases have the formula I STR1 wherein p is 1 or 2 and q is 0 or 1, provided that p+q is 1 or 2, R is a residue of formula II STR2 wherein Q is selected from the residues --CO2 R4, --CON(R4)(R5), --OR5, --OCOR7, --N(R8)(R9), --PO(OR10)([O]x R11), --SO2 R12, --CN, Halogen, --NO2 or --COR13, n is an integer from 1 to 20, k is 1 or 2 and x is 0 or 1, and R1 to R5 and R7 to R13 are as defined in the specification. The compounds of formula I are useful in photographic materials such as bleaching inhibitors in films of photographic silver dye bleach materials.

Hydroquinone ether compounds

New hydroquinone ether compounds of formula I are described: STR1 wherein p is 1 or 2 and q is 0 or 1, provided that p+q is 1 or 2, R is a residue of formula II STR2 and Ro, Roo, R1, R2, R3, Q, n and k are as defined in the specification. The new compounds are useful e.g. as stabilizers in photographic material.

Hydroquinones

New hydroquinones having the formula: STR1 wherein p is 1 or 2 and q is 0 or 1, provided that p+q is 1 or 2; R is a residue of formula: STR2 wherein Q is selected from the residues --COZR4 wherein Z is 0 or NR5, --OX wherein X is R5 or --COR7, --NR8 R9, --PO(OR10)[O]x R11 wherein x is 0 or 1, --SO2 R12 or --CN, and salts thereof with organic or inorganic acid bases. The groups, R1, R2, R3, R4, R5, R7, R8, R9, R10, R11, R12, k and n are defined hereafter. These compounds are used as stabilizers in photographic materials.