Catalytic asymmetric hydrogenation using a [2.2]paracyclophane based chiral 1,2,3-triazol-5-ylidene–Pd complex under ambient conditions and 1 atmosphere of H<sub>2</sub>
Chiral 1,2,3-triazol-5-ylidene–Pd complexes with the planar chiral [2.2]paracyclophane wing tip group have been synthesized and structurally characterized. The complex with a labile acetonitrile co-ligand is an excellent catalyst for chemoselective hydrogenation of alkynes and alkenes and enantioselective hydrogenation of prochiral alkenes at ambient conditions and 1.0 atmosphere of H2.
Iron-catalysed enantioconvergent Suzuki–Miyaura cross-coupling to afford enantioenriched 1,1-diarylalkanes
作者:Chet C. Tyrol、Nang S. Yone、Connor F. Gallin、Jeffery A. Byers
DOI:10.1039/d0cc05003b
日期:——
The first stereoconvergent Suzuki–Miyaura cross-coupling reaction was developed to afford enantioenriched 1,1-diarylalkanes.
第一个立体对映选择性的铃木-宫浦偶联反应被开发出来,用于合成手性富集的1,1-二芳基烷烃。
Nickel-Catalyzed Cross-Couplings of Benzylic Pivalates with Arylboroxines: Stereospecific Formation of Diarylalkanes and Triarylmethanes
作者:Qi Zhou、Harathi D. Srinivas、Srimoyee Dasgupta、Mary P. Watson
DOI:10.1021/ja312087x
日期:2013.3.6
We have developed a stereospecific nickel-catalyzed cross-coupling of benzylic pivalates with arylboroxines. The success of this reaction relies on the use of Ni(cod)(2) as the catalyst and NaOMe as a uniquely effective base. This reaction has broad scope with respect to the arylboroxine and benzylic pivalate, enabling the synthesis of a variety of diarylalkanes and triarylmethanes in good to excellent yields and ee's.
Carboxy-Directed Asymmetric Hydrogenation of 1,1-Diarylethenes and 1,1-Dialkylethenes