Rh
<sup>II</sup>
‐Catalyzed De‐symmetrization of Ethane‐1,2‐dithiol and Propane‐1,3‐dithiol Yields Metallo‐β‐lactamase Inhibitors
作者:Mikhail Krasavin、Daniil Zhukovsky、Igor Solovyev、Darina Barkhatova、Dmitry Dar'in、Denia Frank、Giada Martinelli、Lilia Weizel、Anna Proschak、Marco Rotter、Jan S. Kramer、Steffen Brunst、Thomas A. Wichelhaus、Ewgenij Proschak
DOI:10.1002/cmdc.202100344
日期:2021.11.19
Thiols are potent inhibitors of metallo-β-lactamases, major resistance factors in Gram-negative bacteria. Rh(II)-based coupling procedure of dithiols to diazo building blocks was adopted for diversity-oriented synthesis of a library of metallo-β-lactamase inhibitors. Most potent compounds displayed nanomolar potency and activity in multiresistent clinical isolates.
N-Alkyl α-diazo-γ-butyrolactams, previously found to be unstable and to undergo unproductive dimerization to bishydrazones, were successfully converted immediately to various X–H insertion products with alcohols, aromatic amines and thiols via an in situ RhII-catalyzed reaction. With aliphatic amines or unreactive, sterically hindered anilines, the reactions tended to yield enamine adducts.
investigated in various reactions [such as diazo function elimination and O–H insertion under AgOTf and Rh2(OAc)4 catalysis, respectively]. These compounds are stable if the substituent on the nitrogenatom efficiently conjugates with the carbonyl group.