Carboxylate-Directed Pd-Catalyzed β-C(sp<sup>3</sup>)–H Arylation of <i>N</i>-Methyl Alanine Derivatives for Diversification of Bioactive Peptides
作者:Suyeon Yeom、Do Young Kim、Seungwoo Kim、Arjun Gontala、Jimin Park、Yong Ho Lee、Hak Joong Kim
DOI:10.1021/acs.orglett.3c03616
日期:2023.12.22
This study presents a Pd(II)-catalyzed method for the β-C(sp3)–H arylation of N-Cbz- or N-Fmoc-protected N-methyl alanines, providing ready access to building blocks for N-methylated peptide synthesis. For this transformation, the native carboxylate was exploited as the directing group, attributing its success to the use of a monoprotected amino-pyridine ligand. Its synthetic utility was demonstrated
Fluorine-containing heterocycles: XIX. Synthesis of fluorine-containing quinazolin-4-ones from 3,1-benzoxazin-4-ones
作者:A. A. Laeva、E. V. Nosova、G. N. Lipunova、A. V. Golovchenko、N. Yu. Adonin、V. N. Parmon、V. N. Charushin
DOI:10.1134/s1070428009060190
日期:2009.6
Reactions of fluorine-containing 3,1-benzoxazin-4-ones with ammonium acetate, hydrazine, and heteroaromatic amines gave new 3H-, 3-amino-, and 3-hetarylquinazolin-4-ones, respectively. Differences in the conditions of formation of benzoxazinones from anthranilic acids with different fluorination patterns and in the reactions of fluorinated 3,1-benzoxazinones with nitrogen-centered nucleophiles were revealed.
ASAKAWA H.; MATANO M.; KAWAMATSU Y., CHEM. AND PHARM. BULL., 1979, 27, NO 2, 287-294