Electrochemical coupling of a phenol to a naphthol
View Patent ↗The invention relates to an electrochemical method for the selective coupling of a phenol to a naphthol which differ in their oxidation potential. The invention also relates to compounds which can be produced by electrochemical coupling.
1. A compound represented by the formula (I) or (III):
wherein
R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 21 , R 22 , R 23 , R 24 , R 25 , R 26 , R 27 , R 28 , and R 30 are —H, -alkyl, —O-alkyl, —O-aryl, —S-alkyl, or —S-aryl, and
R 10 and R 29 are -alkyl.
2. The compound according to claim 1 , wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 21 , R 22 , R 23 , R 24 , R 25 , R 26 , R 27 , R 28 , and R 30 are —H or -alkyl.
3. The compound according to claim 1 , wherein R 8 and R 27 are -alkyl.
4. The compound according to claim 1 , wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 21 , R 22 , R 23 , R 24 , R 25 , and R 26 are —H.
5. The compound according to claim 1 , wherein R 7 , R 9 , R 28 , and R 30 are —H.
6. A compound represented by formula (II):
wherein
R 11 , R 12 , R 13 , R 14 , R 15 , R 16 , R 17 , and R 19 are —H, -alkyl, —O-alkyl, —O-aryl, —S-alkyl, or —S-aryl, and
R 18 and R 20 are -alkyl.
7. The compound according to claim 6 , wherein R 11 , R 12 , R 13 , R 14 , R 15 , R 16 , R 17 , and R 19 are —H.