Stereospecific Cross-Coupling of Secondary Alkyl β-Trifluoroboratoamides
摘要:
The stereospecific cross-coupling of enantioenriched nonbenzylic secondary alkyl boron compounds has been achieved. The high selectivity toward product formation over an undesired beta-H elimination pathway is achieved via an intramolecular coordination of an ancillary carbonyl to the metal center in the diorganopalladium intermediate.
Catalytic, Diastereoselective 1,2-Difluorination of Alkenes
作者:Steven M. Banik、Jonathan William Medley、Eric N. Jacobsen
DOI:10.1021/jacs.6b02391
日期:2016.4.20
with all types of substitution patterns. In general, the vicinal difluoride products are produced with high diastereoselectivities. The observed sense of stereoinduction implicates anchimericassistance pathways in reactions of alkenes bearing neighboring Lewis basic functionality.
Enamine chemistry. Part XI. Reaction of αβ-unsaturated acids and acid chlorides with imines. Synthesis of 2-oxotetrahydropyridines and 2-oxo-octahydroquinolines
作者:P. W. Hickmott、G. Sheppard
DOI:10.1039/j39710001358
日期:——
2-Oxotetrahydropyridines and 2-oxo-octahydroquinolines have been isolated from the reaction of acryloyl chloride with imines, together with the enamide and, in some cases, the amide. Crotonoyl and cinnamoyl chlorides give mixtures consisting mainly of the enamides. 2-Oxotetrahydropyridines and 2-oxo-octahydroquinolines have also been isolated from the reaction of acrylic acid with imines. The mechanisms
�ber einige ?-substituierte Fetts�ureamide mit lokalan�sthetischer Wirkung
作者:A. E. Wilder Smith、Emil Hofstetter
DOI:10.1002/hlca.19550380502
日期:——
The preparation and properties of further fatty acid anilides showing anaesthetic action are described and the relationship between chemical constitution and physiological effect is discussed. Two very active compounds having relatively low toxicities have been discovered, namely:-
Synthesis and Suzuki-Miyaura Cross-Coupling of Enantioenriched Secondary Potassium β-Trifluoroboratoamides: Catalytic, Asymmetric Conjugate Addition of Bisboronic Acid and Tetrakis(dimethylamino)diboron to α,β-Unsaturated Carbonyl Compounds
作者:Gary A. Molander、Steven R. Wisniewski、Mona Hosseini-Sarvari
DOI:10.1002/adsc.201300640
日期:2013.10.11
Enantioenriched potassium beta-trifluoroboratoamides have been synthesized via an asymmetric, copper-catalyzed 1,4-addition of tetrahydroxydiboron (BBA) and tetrakis(dimethylamino)diboron to alpha,beta-unsaturated amides. These dibora reagents provide access to the desired organotrifluoroborates using effective and atom economical sources of boron. The copper-catalyzed beta-boration is extended to
Rhodium(I)-Catalyzed Asymmetric 1,4-Addition of Arylboronic Acids to α,β-Unsaturated Amides
作者:Satoshi Sakuma、Norio Miyaura
DOI:10.1021/jo010747n
日期:2001.12.1
The conjugate addition of arylboronic acids to alpha,beta-unsaturated amides was carried out in the presence of a chiral rhodium catalyst and an aqueous base. The catalyst prepared in situ from Rh(acac)(CH(2)=CH(2))(2) and (S)-binap provided (R)-N-benzyl-3-phenylbutanamide with 93% ee in the addition of phenylboronic acid to N-benzyl crotonamide. The reaction suffered from incomplete conversion resulting