反应详情

Reaction Scheme 13 provides an example for the preparation of 2,6-di-tert-butylisonicotinic acid (Compound C3) which is a reagent in accordance with Formula 8 for the preparation of several preferred compounds of the present invention. Thus, 2,6-di-tert-butyl-4-methylpyridine (available commercially from Aldrich Chemical Co.) is reacted with N-bromosuccinimide and benzoyl peroxide to provide 4-bromomethyl-2,6-di-tert-butylpyridine (Compound A3). Compound A3 is reacted with base (sodium hydroxyde) to yield the coresponding hydroxymethyl compound (Compound B3), which is thereafter oxidized in a Jones oxidation reaction to give 2,6-di-tert-butylisonicotinic acid (Compound C3).

1. customReaction Scheme 13
2. customprovides an example
3. customfor the preparation of several preferred compounds of the present invention