In 2019,Angewandte Chemie, International Edition included an article by Hu, Liang; Shen, Peng-Xiang; Shao, Qian; Hong, Kai; Qiao, Jennifer X.; Yu, Jin-Quan. HPLC of Formula: 24388-23-6. The article was titled 《PdII-Catalyzed Enantioselective C(sp3)-H Activation/Cross-Coupling Reactions of Free Carboxylic Acids》. The information in the text is summarized as follows:
PdII-catalyzed enantioselective C(sp3)-H cross-coupling of free carboxylic acids with organoborons was achieved using either mono-protected amino acid (MPAA) ligands or mono-protected aminoethyl amine (MPAAM) ligands. A diverse range of aryl- and vinyl-boron reagents could be used as coupling partners to provide chiral cyclopropanecarboxylic acids, e.g., I. This reaction provided an alternative approach to the enantioselective synthesis of cyclopropanecarboxylic acids and cyclobutanecarboxylic acids containing α-chiral tertiary and quaternary stereocenters, e.g., II. The utility of this reaction was further demonstrated by converting the carboxylic acid into cyclopropyl amine without loss of optical activity. In the experimental materials used by the author, we found 4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane(cas: 24388-23-6HPLC of Formula: 24388-23-6)
4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane(cas: 24388-23-6) can be used to prepare sulfinamide derivatives by reacting with diethylaminosulfur trifluoride (DAST) and potassium phenyltrifluoroborate.HPLC of Formula: 24388-23-6
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