Hong, Chao published the artcileRh-Catalyzed Coupling of Acrylic/Benzoic Acids with ¦Á-Diazocarbonyl Compounds: An Alternative Route for ¦Á-Pyrones and Isocoumarins, Formula: C8H8O2, the publication is Organic Letters (2022), 24(3), 815-820, database is CAplus and MEDLINE.
A coupling of acrylic acids/benzoic acids with ¦Á-diazocarbonyl compounds had been realized by a combined catalytic system of rhodium catalyst and Zn(OAc)2 additive. The presence of Zn(OAc)2 obviously accelerates the C(sp2)-H activation and destructed the formation of carboxylic ester that was formed via a nucleophilic O-H insertion to metal carbenoid. The procedure featured mild reaction conditions and broad substrate scope, providing a straightforward approach to the synthesis of ¦Á-pyrones I [R1 = Me, Ph, Bn, etc.; R2 = H, Me, Ph; R1R2 = (CH2)4; R3 = Me, Et, allyl, t-Bu, R4 = Me, Et, Ph, etc.] and isocoumarins II [R = H, 8-Me, 8-Me-6-MeO, etc.] without the transformation of carboxylic acids to the corresponding amides.
Organic Letters published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C8H8O2, Formula: C8H8O2.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia