Rhodium(II)-Catalyzed Enantioselective Intermolecular Aziridination of Alkenes
作者:Vincent Boquet、Ali Nasrallah、Alejandro L. Dana、Erwan Brunard、Pablo H. Di Chenna、Fernando J. Duran、Pascal Retailleau、Benjamin Darses、Marie Sircoglou、Philippe Dauban
DOI:10.1021/jacs.2c07337
日期:2022.9.21
dirhodium(II) tetracarboxylates are highly efficient catalysts for the asymmetric intermolecular aziridination of substituted alkenes with sulfamates. The reaction proceeds with high levels of efficiency and chemoselectivity to afford aziridines with excellent yields of up to 95% and enantiomeric excesses of up to 99%. The scope of the alkene aziridination includes mono-, di-, and trisubstituted olefins as well
Catalytic Intermolecular C(sp<sup>3</sup>)–H Amination: Selective Functionalization of Tertiary C–H Bonds vs Activated Benzylic C–H Bonds
作者:Erwan Brunard、Vincent Boquet、Elsa Van Elslande、Tanguy Saget、Philippe Dauban
DOI:10.1021/jacs.1c03872
日期:2021.5.5
A catalytic intermolecular amination of nonactivated tertiary C(sp3)–H bonds (BDE of 96 kcal·mol–1) is reported for substrates displaying an activated benzylic site (BDE of 85 kcal·mol–1). The tertiary C(sp3)–H bond is selectively functionalized to afford α,α,α-trisubstituted amides in high yields. This unusual site-selectivity results from the synergistic combination of Rh2(S-tfpttl)4, a rhodium(II)