Rao, H. Surya Prakash published the artcileCopper-catalyzed C(sp3)-C(sp2) cross-coupling. Synthesis of 4-aryl-2-alkyl-amino-3-nitro-4H-chromenes, COA of Formula: C5H6BNO2, the publication is European Journal of Organic Chemistry (2014), 2014(17), 3646-3655, database is CAplus.
Inexpensive copper(II) acetate effectively catalyzes cross-coupling of electron-deficient as well as electron-rich arylboronic acids with 4-methylsulfanyl-2-alkylamino-3-nitro-4H-chromenes under near neutral conditions at room temperature to furnish a range of 4-aryl-4H-chromenes. This new strategy enabled substitution of the C(4)SMe group present on a sp3 hybridized carbon of the 4H-chromenes with aryl/heteroaryl groups. Mechanistic probing revealed that the Cu(I)-Cu(III) cycle is involved in catalysis. One-pot sequential substitution of C(4)SMe followed by C(6)Br with aryl groups was achieved through Cu(OAc)2 and Pd2(dba)3 (Suzuki coupling) catalysis. © 2014 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
European Journal of Organic Chemistry published new progress about 197958-29-5. 197958-29-5 belongs to pyridine-derivatives, auxiliary class Pyridine,Boronic acid and ester, name is 2-Pyridinylboronic acid, and the molecular formula is C5H6BNO2, COA of Formula: C5H6BNO2.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem