Decarbonylative Cross-Coupling of Cyclic Anhydrides: Introducing Stereochemistry at an sp<sup>3</sup> Carbon in the Cross-Coupling Event
作者:Erin M. O'Brien、Eric A. Bercot、Tomislav Rovis
DOI:10.1021/ja036290b
日期:2003.9.1
Treatment of cyclicanhydrides with stoichiometric amounts of nickel-neocuproine complex generates alkylcarboxylato-nickelalactones upon extrusion of CO. These metalacycles undergo cross-coupling with arylzinc reagents. The generated CO is sequestered in situ by a nickel-dppb complex. The overall sequence effects a secondary sp3(electrophile)-sp2(nucleophile) cross-coupling and allows for control of
用化学计量的镍-新铜碱配合物处理环状酸酐,在挤出 CO 时生成烷基羧基-镍内酯。这些金属环与芳基锌试剂发生交叉偶联。产生的 CO 被镍-dppb 复合物原位隔离。整个序列影响二次 sp3(亲电试剂)-sp2(亲核试剂)交叉偶联,并允许在键形成事件期间控制立体化学。
A new catalytic process based on sequential insertion of strained olefins and carbon monoxide into Pd-C bonds.
作者:Marta Catellani、Gian Paolo Chiusoli、Cesare Peloso
DOI:10.1016/s0040-4039(00)81535-x
日期:1983.1
A palladium-catalyzed synthesis of carboxylic acids, esters and anhydrides by sequential alkylation, vinylation or arylation and carbonylation of strained olefins is reported.
Interaction entre groupes aromatique et polaire voisins—III
作者:L. Nicolas、M. Beugelmans-Verrier、J. Guilhem
DOI:10.1016/s0040-4020(01)98883-0
日期:1981.1
synthesis, 1H and 13CNMRspectra of acids 1 to 4 and methyl esters 5 to 8 are described. Interaction of aromatic and polar groups in the cis acids must be steric in origin and not due to charge transfer complex or hydrogen bonding. The structure of 1e,3a,5e and 7e has been determined by X-Ray crystallography. 1H and 13CNMRstudies indicate that, in the cis compounds, the proximity of aromatic and polar groups
描述了酸1至4和甲酯5至8的合成,1 H和13 C NMR光谱。顺式酸中芳族和极性基团的相互作用必须起源于空间,而不是由于电荷转移络合物或氢键。的结构1E,3A,图5e和图7e已通过X-射线结晶学确定。1 H和13 C NMR研究表明,在顺式 在化合物中,芳族和极性基团的接近往往会给它们强加一些主要的构象,这些构象在晶体或溶液中应类似。
NICOLAS, L.;BEUGELMANS-VERRIER, M., TETRAHEDRON, 1981, 37, N 22, 3847-3860