Xue, Yuan published the artcilePalladium-Catalyzed β-C(sp3)-H Nitrooxylation of Ketones and Amides Using Practical Oxidants, Safety of Pyridine-3-sulfonic acid, the publication is ACS Catalysis (2021), 11(22), 14188-14193, database is CAplus.
Herein, a Pd(II)-catalyzed β-C(sp3)-H nitrooxylation of ketones and native amides was reported. The fine-tuned removable aminooxyamide auxiliary enabled β-C(sp3)-H functionalization of various aliphatic ketones. Practical iron(III) nitrate nonahydrate was used as the nitrate source and a single-electron oxidant for Pd(II)/Pd(III)/Pd(IV) catalysis. For amide substrates, N-iodosuccinimide (NIS) was applied as a bystanding two-electron oxidant in combination with silver nitrate for β-C(sp3)-H nitrooxylation. Palladacycle intermediates were isolated and characterized to elucidate the reaction mechanism for the C(sp3)-H activation of ketones with the L,X-type imino-amide directing group.
ACS Catalysis published new progress about 636-73-7. 636-73-7 belongs to pyridine-derivatives, auxiliary class Pyridine,Sulfonic acid, name is Pyridine-3-sulfonic acid, and the molecular formula is C9H10O3S, Safety of Pyridine-3-sulfonic acid.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem