Organic thermally activated delayed fluorescence material with strained benzoguanidine donor

• Alexander C. Brannan,
• Elvie F. P. Beaumont,
• Nguyen Le Phuoc,
• George F. S. Whitehead,
• Mikko Linnolahti and
• Alexander S. Romanov

Beilstein J. Org. Chem. 2023, 19, 1289–1298, doi:10.3762/bjoc.19.95

•  1. Benzoguanidine has an extended π-conjugation compared with carbazole and is more nitrogen-rich (three N-atoms vs one in carbazole). Thompson et al. recently reported a series of carbene–metal–amide (CMA) (metal = Cu, Ag, Au) emitters employing a benzoguanidine ligand [10]. The extended π

Development of chiral metal amides as highly reactive catalysts for asymmetric [3 + 2] cycloadditions

• Yasuhiro Yamashita,
• Susumu Yoshimoto,
• Mark J. Dutton and
• Shū Kobayashi

Beilstein J. Org. Chem. 2016, 12, 1447–1452, doi:10.3762/bjoc.12.140

• ; metal amide; Findings Catalytic asymmetric synthesis is an ideal method to prepare optically active compounds [1]. In this context, catalytic asymmetric carbon–carbon bond-forming reactions that can be used for the efficient construction of fundamental frameworks of complex chiral molecules such as

• reactive substrates react smoothly to afford the desired products in high yields with high stereoselectivities. Based on these results, it was considered that metal amide catalysts might also achieve high catalyst turnover. Here, we report chiral copper amide-catalyzed asymmetric [3 + 2] cycloadditions of

• chiral CuHMDS have been described. Compared with catalysis by using the CuOTf/Et3N system, the Cu amide system showed higher reactivity, and the reactions proceeded with high enantioselectivities even with 0.01 mol % catalyst loading. Further investigations that are focused on the application of metal

Directed aromatic functionalization

• Victor Snieckus

Beilstein J. Org. Chem. 2011, 7, 1215–1218, doi:10.3762/bjoc.7.141

• exchange) chemistry, alternative and competitive combinational metal amide bases are rapidly appearing [47][48]. The first successful glimpses of the much sought after complementary, cleaner, regiodefined, and milder procedures to ortho, para versus meta SEAr reactions are being seen in Cu-catalyzed meta

• Roberto Sanz; a hint of the potential of meta metalation by mixed metal/amide bases is posited by Robert Mulvey; and the application of such base combinations for the ready construction of planar chiral metacyclophanes is delightfully revealed by Donal O’Shea; striking evidence of the power of aryl metal