An article Disparate Catalytic Scaffolds for Atroposelective Cyclodehydration WOS:000466053400036 published article about BROMINATION in [Kwon, Yongseok; Li, Junqi; Miller, Scott J.] Yale Univ, Dept Chem, New Haven, CT 06520 USA; [Li, Junqi; Jacob, Roxane; Toste, F. Dean] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA; [Reid, Jolene P.; Crawford, Jennifer M.; Sigman, Matthew S.] Univ Utah, Dept Chem, 315 South 1400 East, Salt Lake City, UT 84112 USA in 2019, Cited 55. Recommanded Product: 4-Nitrobenzoic acid. The Name is 4-Nitrobenzoic acid. Through research, I have a further understanding and discovery of 62-23-7
Catalysts that control stereochemistry are prized tools in chemical synthesis. When an effective catalyst is found, it is often explored for other types of reactions, frequently under the auspices of different mechanisms. As successes mount, a unique catalyst scaffold may become viewed as privileged. However, the mechanistic hallmarks of privileged catalysts are not easily enumerated or readily generalized to genuinely different classes of reactions or substrates. We explored the concept of scaffold uniqueness with two catalyst types for an unusual atropisomerselective cyclodehydration: (a) C-2-symmetric chiral phosphoric acids and (b) phosphothreonine-embedded, peptidic phosphoric acids. Pragmatically, both catalyst scaffolds proved fertile for enantioselective/atroposelective cyclodehydrations. Mechanistic studies revealed that the determinants of often equivalent and high atroposelectivity are different for the two catalyst classes. A data-descriptive classification of these asymmetric catalysts reveals an increasingly broad set of catalyst chemotypes, operating with different mechanistic features, that creates new opportunities for broad and complementary application of catalyst scaffolds in diverse substrate space.
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Reference:
Phthalazine – Wikipedia,
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