Zeng, Rong published the artcileRh-Catalyzed Decarbonylative Coupling with Alkynes via C-C Activation of Isatins, Name: 1-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrrolo[2,3-b]pyridine, the publication is Journal of the American Chemical Society (2015), 137(4), 1408-1411, database is CAplus and MEDLINE.
Herein we report a [5 + 2 – 1] transformation though catalytic decarbonylative coupling between isatins and alkynes, which provides a unique way to synthesize 2-quinolinone derivs I [R1 = H, 6-Me; R2 = Me, Bn; R3 = Ph, Bu, 4-Me-C6H4, etc; R4 = Me, Ph, CO2Me, etc; DG= pyridin-2-yl, 3-Me-pyridin-2-yl]. A broad range of alkynes can be coupled efficiently with high regioselectivity. This reaction is proposed to go through C-C activation of isatins, followed by decarbonylation and alkyne insertion. Directing group (DG) plays a critical role in this transformation. Assisted by the DG, the C-C cleavage of isatins occurs at room temperature
Journal of the American Chemical Society published new progress about 1644629-23-1. 1644629-23-1 belongs to pyridine-derivatives, auxiliary class Other Aromatic Heterocyclic,Boronic acid and ester,Boronate Esters,Boronic Acids,Boronic acid and ester, name is 1-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrrolo[2,3-b]pyridine, and the molecular formula is C28H29NO4, Name: 1-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrrolo[2,3-b]pyridine.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem