Carboxylate Anions Accelerate Pyrrolidinopyridine (PPy)-Catalyzed Acylation: Catalytic Site-Selective Acylation of a Carbohydrate by in Situ Counteranion Exchange
Acylpyridinium ions have been known as catalytically active species in acylation reactions catalyzed by 4-dimethylaminopyridine and its analogues. Acylpyridinium carboxylates were found to be 800–1300 times more reactive than the corresponding acylpyridinium chlorides. A catalytic cycle was developed, in which acylpyridinium carboxylates were generated by in situ counteranion exchange from the acylpyridinium
To provide a process for producing a specific anthranilamide compound or its salt.
To provide a process for producing an anthranilamide compound represented by the formula (I) or its salt:
wherein each of R
1a
and R
3
which are independent of each other, is halogen or haloalkyl; R
2
is cyclopropyl alkyl or cyclobutyl alkyl; and Hal is a chlorine atom or a bromine atom, which comprises a step of selectively halogenating a compound represented by the formula (II):
wherein R
1a
, R
2
and R
3
are as defined above.
To provide a process for producing a specific anthranilamide compound or its salt.
To provide a process for producing an anthranilamide compound represented by the formula (I) or its salt:
wherein each of R1a and R3 which are independent of each other, is halogen or haloalkyl; R2 is cyclopropyl alkyl or cyclobutyl alkyl; and Hal is a chlorine atom or a bromine atom, which comprises a step of selectively halogenating a compound represented by the formula (II):
wherein R1a, R2 and R3 are as defined above.