受铑催化羧酸经济向丙二烯中添加羧酸的机理研究的启发,已开发出铑催化的不同亲核试剂与消旋烯丙基碳酸酯的动态动力学不对称烯丙基化反应。在中性条件下可以获得很高的区域选择性和对映选择性,此外,化学选择性可以通过不同的二膦配体来控制。(R,R)-QuinoxP *导致酚的选择性O-烯丙基化,而当嵌入(S,S)-DIOP作为配体时,2-萘酚首次以高对映选择性被邻-C-烯丙基化。为此,羟基吡啶可以通过Rh I /(S)-DTBM-Segphos的中间体与先前报道的对丙二烯的原子经济加成反应相同。
Reactions of allylic carbonates catalyzed by palladium, rhodium, ruthenium, molybdenum, and nickel complexes; allylation of carbonucleophiles and decarboxylation- dehydrogenation
作者:Ichiro Minami、Isao Shimizu、Jiro Tsuji
DOI:10.1016/0022-328x(85)80354-5
日期:1985.11
carbonucleophiles with allylic carbonatescatalyzed by various transition metal complexes has been studied. Palladium, rhodium, ruthenium, nickel, and molybdenum complexes were found to be active catalysts. The rhodium catalyst showed a different regioselectivity from the other catalysts, the reaction can proceed without allylic rearrangement. In the absence of nucleophiles, allyl alkyl carbonates were converted into
Allyation of carbonucleophiles with allylic carbonates under neutral conditions catalyzed by rhodium complexes
作者:Jiro Tsuji、Ichiro Minami、Isao Shimizu
DOI:10.1016/s0040-4039(01)81551-3
日期:——
Rhodium-phosphine complexes catalyze the allylation of carbonucleophiles with allylic carbonates under neutral conditions. In addition, we found unusual regioselectivity in the rhodium catalyzed allylation.
Regio- and Enantioselective Allylic Alkylation of Terminal Alkynes by Synergistic Rh/Cu Catalysis
作者:Wen-Yu Huang、Chun-Hua Lu、Samir Ghorai、Bing Li、Changkun Li
DOI:10.1021/jacs.0c08283
日期:2020.9.9
A highly branch- and enantioselective 1,4-enynes synthesis from readily available terminalalkynes and racemic allylic carbonates by Sonogashira type synergistic Rh and Cu catalysis under neutral conditions has been developed. Aliphatic and aromatic terminalalkynes with various functional groups could be used directly. An inner-sphere reductive elimination C(sp)-C(sp3) bond formation mechanism is
在中性条件下,Sonogashira 型协同 Rh 和 Cu 催化从容易获得的末端炔烃和外消旋烯丙基碳酸酯合成高度支化和对映选择性的 1,4-烯炔。可以直接使用具有各种官能团的脂肪族和芳香族末端炔烃。化学计量反应支持内球体还原消除 C(sp)-C(sp3) 键形成机制。
Organophotoredox/palladium dual catalytic decarboxylative Csp<sup>3</sup>–Csp<sup>3</sup>coupling of carboxylic acids and π-electrophiles
作者:Kaitie C. Cartwright、Jon A. Tunge
DOI:10.1039/d0sc02609c
日期:——
A dual catalytic decarboxylative allylation and benzylation method for the construction of new C(sp3)–C(sp3) bonds between readily available carboxylic acids and functionallydiverse carbonate electrophiles has been developed. The new process is mild, operationally simple, and has greatly improved upon the efficiency and generality of previous methodology. In addition, new insights into the reaction
Thioamide-Directed Cp*Co(III)-Catalyzed C–H Allylation of Ferrocenes
作者:Zhuo-Zhuo Zhang、Gang Liao、Hao-Ming Chen、Bing-Feng Shi
DOI:10.1021/acs.orglett.1c00533
日期:2021.4.2
developed. This reaction is compatible with a wide range of functional groups, providing various allylated ferrocene derivatives in up to 90% yields. In addition, the C–H allylation protocol is also compatible with the use of vinylcyclopropanes as allylatingreagents by merging C–H and C–C activation into one catalytic system. Mechanistic studies revealed that the thiocarbonyl-directing group plays a vital
在这里,已开发出第一批Cp * Co(III)催化的二茂铁硫代酰胺与碳酸烯丙酯的C-H烯丙基化反应。该反应与广泛的官能团相容,以高达90%的产率提供了各种烯丙基化的二茂铁衍生物。此外,通过将CH和CC活化合并到一个催化体系中,C H H烯丙基化方案还与乙烯基环丙烷用作烯丙基化试剂兼容。机理研究表明,硫代羰基导向基团在C–H活化中起着至关重要的作用。