Protocatechuic aldehyde preparation by vanillin demethylation ???

Joker_55555

Don't buy from me
Resident
Language
🇺🇸
Joined
Jun 17, 2022
Messages
100
Reaction score
25
Points
28
Has anyone done this reaction with good yield using pyridine or triethylamine?
 

WillD

Expert
Joined
Jul 19, 2021
Messages
774
Reaction score
1,056
Points
93
Chinese patents use pyridine.
 

Joker_55555

Don't buy from me
Resident
Language
🇺🇸
Joined
Jun 17, 2022
Messages
100
Reaction score
25
Points
28
pyridine is expensive
 

HerrHaber

Don't buy from me
Resident
Language
🇬🇧
Joined
Jan 15, 2023
Messages
570
Reaction score
309
Points
63
Aside from pyridine and NEt3 which are popular, I know 2,4,6-trimethylpyridine a.k.a. sim-colidine (not sure I remember the correct name, have to check) is superior in some cases (would have donated you a merk bottle of 250mL, had a few thrown away). in LSD synthesis momomethyl diethylamine (MeNEt2) is used to catch the proton and let the diethylamine react. Since chemistry is also saying CHEM IS TRY, you need to get small amounts of each and perform on tiny scale.
 
Top