Efficient Transamination under Mild Conditions: Preparation of Primary Amine Derivatives from Carbonyl Compounds via Imine Isomerization with Catalytic Amounts of Potassium tert-Butoxide
摘要:
1,3-Prototropic rearrangement of N-diphenylmethanimines was successfully performed with a catalytic amount of potassium tert-butoxide. This procedure can also be used with aliphatic and aromatic aldimines and was extended to the isomerization of (1R)-camphorquinone monoimine and N-(4-methoxyphenyl)-4-phenyl-3-iminoazetidin-2-one. The isomerized imines were easily hydrolyzed and isolated as Cbz derivatives.
Reductive Elimination to Form C(sp<sup>3</sup>)–N Bonds from Palladium(II) Primary Alkyl Complexes
作者:D. Matthew Peacock、Quan Jiang、Thomas R. Cundari、John F. Hartwig
DOI:10.1021/acs.organomet.8b00617
日期:2018.10.8
Reductiveeliminations to form alkyl–nitrogen bonds are rare, and examples of this reaction from isolated complexes containing simple, unstabilized primary alkyl groups have not been observed. We report the synthesis of stable neopentylpalladium(II) anilido and methyleneamido complexes that undergo reductiveelimination to form the C(sp3)–N bonds in N-neopentyl anilines and N-neopentyl imines, respectively
Darstellung und eigenschaften von N-(diphenylmethylen)-triorganoelement-methylaminen (element = C, Si, Ge, Sn)
作者:E. Popowski、A. Hahn、H. Kelling
DOI:10.1016/s0022-328x(00)82488-2
日期:1976.4
N-(Diphenylmethylene)triorganoelement-methylamines, (C6H5)2CNCH2MR3 (M C, Si, Ge, Sn), have been prepared by treatment of triorganoelement halides with 1,1-diphenyl-2-azaallyllithium. The IR, UV and NMR data of these compounds are discussed and compared with the spectroscopic data of the corresponding allyl compounds. As in allyl compounds these data can only be explained by assuming conjugative
Ni-catalyzed decarboxylative C(sp3)−N cross-coupling of redox active ester and oxime esters was realized through electrochemical cathodic reduction. Mechanistic studies unveil a high-valent nickel species-driven reductive elimination pathway, rather than direct radical-radical coupling. The utility of this methodology was demonstrated through a broad scope (1°, 2°, 3° carboxylic acids) and late-stage