A Case Study in Catalyst Generality: Simultaneous, Highly-Enantioselective Brønsted- and Lewis-Acid Mechanisms in Hydrogen-Bond-Donor Catalyzed Oxetane Openings
Highly Enantioselective, Hydrogen-Bond-Donor Catalyzed Additions to Oxetanes
作者:Daniel A. Strassfeld、Zachary K. Wickens、Elias Picazo、Eric N. Jacobsen
DOI:10.1021/jacs.0c03991
日期:2020.5.20
addition of trimethylsilyl bromide (TMSBr) to a broad variety of 3-substituted and 3,3-disubstituted oxetanes. The reaction provides direct and gen-eral access to synthetically valuable 1,3-bromohydrin building blocks from easily accessed achiral precursors. The products are readily elaborated both by nucleophilic substitution and through transition-metal-catalyzed cross-coupling reactions. The enantioselective
Disclosed herein are pyrazole glucokinase activators of the formula (I)
useful for the treatment of metabolic diseases and disorders, preferably diabetes mellitus.
本文披露了一种式(I)的吡唑葡萄糖激酶激活剂,用于治疗代谢性疾病和紊乱,最好是糖尿病。
Bioinspired Cobalt-Catalysis Enables Generation of Nucleophilic Radicals from Oxetanes
their well-explored propensity to undergo ring-opening reactions with nucleophiles. However, their application as precursors of radical species is still elusive. Herein, we present a bioinspired cobalt-catalysis-based strategy to access unprecedented modes of radical reactivity via oxetane ring-opening. This powerful approach gives access to nucleophilic radicals that engage in reactions with SOMOphiles
Disclosed herein are pyrazole glucokinase activators of the formula (I)
wherein R1 to R4 are as defined in the specification and claims, useful for the treatment of metabolic diseases and disorders, preferably diabetes mellitus.