Palladium‐Catalyzed Branch‐ and Z‐Selective Allylic C−H Amination with Aromatic Amines

Abstract

Allylamines are important building blocks in the synthesis of bioactive compounds. The direct coupling of allylic CÀ H bonds and commonly available amines is a major synthetic challenge. An allylic CÀ H amination of 1,4-dienes has been accomplished by palladium catalysis. With aromatic amines, branchselective allylic aminations are favored to generate thermodynamically unstable Z-allylamines. In addition, more basic aliphatic cyclic amines can also engage in the reaction, but linear dienyl allylic amines are the major products.

Donor Extension on Spiro‐Acridine Enables Highly Efficient TADF‐OLEDs with Relieved Efficiency Roll‐Off

“…Recently, our group provided a parallel donor design and constructed D2T‐TRZ with EQE max of 27.2% and efficiency roll‐off of 11%/30% under 100 and 1000 cd m −2 . [ 36,37 ] To further explore such design, a structural modulation on conjugation extension via side acridine has been performed and assembled p‐D2T. A quite unexpected decreased EQE max of 25.6% and suffered roll‐off of 18%/36% under 100 and 1000 cd m −2 were achieved.…”

“…[ 14,34,35 ] Recently, we have developed a simple synthetic method to construct SAs that may improve the modulating feasibility. [ 36 ] All these advantages make SAs an outstanding model for further exploring the structure‐property relationship of TADF emitters.…”

Facilitating Molecular Activation and Proton Feeding by Dual Active Sites on Polymeric Carbon Nitride for Efficient CO2Photoreduction

“…The formation site of nitrogen vacancies in H-C 3 N 4 was experimentally studied by the NMR technique. In the 15 N spectra, strong formants appeared at 201.1 ppm, 191.5 ppm, 156 ppm, 135.7 ppm, 116 ppm, and 101 ppm, which were attributed to the pyridinic N close to linking À NH (N1), terminal NH 2 groups (N2), the central nitrogen atom of heptazine (N3), bridging N (À NHÀ ) of the intrapolymer chain (N4), non-hydrogen-bonded -NH 2 groups (N5), and hydrogen-bonded -NH 2 groups (N5'), respectively (Figure 2g). [31] The N1/N2 area ratio of H-C 3 N 4 (0.44) was lower than that of pristine P-C 3 N 4 (0.49) (Supporting Information, Figure S12), confirming the existence of pyridinic N vacancies in the hydrogen-synthesized samples.…”

“…[14] Tremendous effort has thus been directed to improving the CO 2 activation capability of g-C 3 N 4 through facet engineering, defect modulation, metalation engineering, or heterostructure design. [15][16][17][18] For example, crystalline carbon nitride with surface defects enabled the effective gasphase CO 2 photoreduction into hydrocarbon fuels. [19] Further, single Pt atoms, CN defects, and À OH groups have demonstrated a synergistic effect for improving the efficiency of CO 2 methanation.…”

Chiral 8-Amino-5,6,7,8-tetrahydroquinoline Derivatives in Metal Catalysts for the Asymmetric Transfer Hydrogenation of 1-Aryl Substituted-3,4-dihydroisoquinolines as Alkaloids Precursors

“…[ 4 , 5 , 6 ] allylic amination, refs. [ 7 , 8 ] asymmetric N-H carbene insertion [ 9 , 10 ] or one-pot chemoenzymatic protocols [ 11 , 12 , 13 ]. Nonetheless, the asymmetric reduction of C=N bonds still provides one of the most accessible and practical strategies to afford enantiomerically enriched amines.…”