A room-temperature and one-pot synthesis of ε-CF3-substituted amides via the copper-catalyzed trifluoromethylation of alkenes with redox-neutral remote amidation of aldehydes is described. This reaction is featured by an unprecedented 1,5-H atom abstraction from aldehydic C–H bonds by α-CF3-alkyl radicals resulting from the radical trifluoromethylation of alkenes, thus enabling a new possibility of
A novel nickel-catalyzed remote arylation of alkenyl aldehydes triggered by radical alkylation with tertiary α-carbonyl alkyl bromides is described, thus producing a quaternary carbon center containing ketones in promising yields with broad functional group compatibility. Preliminary mechanistic studies suggest that the combination of a 1,n-HAT (n = 5 or 6) from alkyl radicals to aldehyde C–H bonds
Palladium-Catalyzed Remote Aryldifluoroalkylation of Alkenyl Aldehydes
作者:Xingliang Nie、Cungui Cheng、Gangguo Zhu
DOI:10.1002/anie.201611697
日期:2017.2.6
A palladium‐catalyzed three‐component reaction between fluoroalkyl bromides, arylboronic acids, and alkenyl aldehydes has been developed and provides facile access to 5‐, 6‐, or 7‐difluoroalkylated ketones under very mild reaction conditions. The resultant products can be smoothly converted into CF2‐containing tetrahydronaphthalenes by a novel silver‐catalyzed intramolecular decarboxylative cyclization
2-Alkyl nicotinoids and processes for their production and use
申请人:PHILIP MORRIS INCORPORATED
公开号:EP0000106A1
公开(公告)日:1978-12-20
2-Alkyl-nicotinoids represented by formula (I)
wherein R1 is hydrogen, lower alkyl, phenyl alkyl or aralkyl, R2 is lower alkyl or phenyl alkyl, and R3 is represented by the formula:
wherein R4 is hydrogen or lower alkyl, Rs is lower alkyl, and n is one or two, which are prepared according to the schema:
wherein X =chlorine,bromine,
iodine or
fluorine I
The compounds of formula (i) are useful as insecticides.