Tsukamoto, Hirokazu published the artcilePalladium(II)-Catalyzed Annulation of Alkynes with ortho-Ester-Containing Phenylboronic Acids, COA of Formula: C15H21BO4, the publication is Organic Letters (2007), 9(21), 4227-4230, database is CAplus and MEDLINE.
Palladium(II) catalyzes annulation of internal alkynes with Me 2-boronobenzoate and (2-boronophenyl)acetate to provide 2,3-disubstituted indenones and 3,4-disubstituted 2-naphthols, resp. E.g., [1,2-bis(diphenylphosphino)ethane]palladium(II) ditrifluoroacetate catalyzed the reaction of 2-methoxycarbonylphenylboronic acid with bis(4-methoxyphenyl)acetylene to give 98% indenone I. The annulation reaction would proceed through transmetalation of Pd(II) with the boron reagents and insertion of the alkynes, followed by unprecedented 1,2-addition of the generated alkenylpalladium(II) species to the intramol. ester group.
Organic Letters published new progress about 956229-86-0. 956229-86-0 belongs to esters-buliding-blocks, auxiliary class Boronic acid and ester,Benzene,Ester,Boronate Esters,Boronic acid and ester, name is Methyl 2-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)acetate, and the molecular formula is C20H17FO4S, COA of Formula: C15H21BO4.
Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics