“Bulky-Yet-Flexible” α-Diimine Palladium-Catalyzed Reductive Heck Cross-Coupling: Highly Anti-Markovnikov-Selective Hydroarylation of Alkene in Air
作者:Xu-Wen Yang、Dong-Hui Li、A-Xiang Song、Feng-Shou Liu
DOI:10.1021/acs.joc.0c01509
日期:2020.9.18
regioselective and efficient reductive Heck reaction, a series of moisture- and air-stable α-diimine palladium precatalysts were rationally designed, readily synthesized, and fully characterized. The relationship between the structures of the palladiumcomplexes and the catalytic properties was investigated. It was revealed that the“bulky-yet-flexible”palladiumcomplexes allowed highly anti-Markovnikov-selective
Copper(<scp>i</scp>)-catalysed transfer hydrogenations with ammonia borane
作者:Eva Korytiaková、Niklas O. Thiel、Felix Pape、Johannes F. Teichert
DOI:10.1039/c6cc09067b
日期:——
Highly Z-selective alkyne transfer semihydrogenations and conjugate transferhydrogenations of enoates can be effected by employing a readily available copper(I)/N-heterocyclic carbene (NHC) complex, [IPrCuOH], in combination with ammoniaborane as a H2 equivalent.
Efficient phosphine-mediated formal C(sp<sup>3</sup>)–C(sp<sup>3</sup>) coupling reactions of alkyl halides in batch and flow
作者:U. P. N. Tran、K. J. Hock、C. P. Gordon、R. M. Koenigs、T. V. Nguyen
DOI:10.1039/c7cc02033c
日期:——
transformation in synthetic chemistry due to its abundance in organic scaffolds. Here we demonstrate a valuable adaptation of the Wittig-type chemical procedure to efficiently facilitate C(sp3)–C(sp3) bond formation utilizing a range of alkyl building blocks. Additionally the method is amenable with flow synthesis to afford coupled products in good to excellent yields without laborious purification process
Cross-coupling reactions of primary alkylboronic acids with aryl triflates and aryl halides
作者:Gary A. Molander、Chang-Soo Yun
DOI:10.1016/s0040-4020(02)00009-1
日期:2002.2
The cross-coupling reactions of primaryalkylboronicacids with aryl triflates and aryl halides has been successfully achieved using PdCl2(dppf)·CH2Cl2 in the presence of potassium carbonate to provide the corresponding Suzuki coupled products in high yields.
1,2-Diarylethanols by Alternative Regioselective Reductive Ring-Opening of 2,3-Diaryloxiranes
作者:Nadia Di Blasio、Maria Teresa Lopardo、Paolo Lupattelli
DOI:10.1002/ejoc.200800992
日期:2009.2
Non-symmetrical trans-2,3-diaryloxiranes have been regioselectively opened by catalytic hydrogenation over Pd/C, NaBH4/Pd and [Cp2TiCl]/H2O. Although in the catalytic hydrogenation reactions the epoxides were mainly opened at the β-carbon with respect to the substituted aryl ring in all cases, with the [Cp2TiCl]/H2O system the regioselectivity was affected by the electronic properties of the aryl residues