Accessing Difluoromethylated and Trifluoromethylated
<i>cis</i>
‐Cycloalkanes and Saturated Heterocycles: Preferential Hydrogen Addition to the Substitution Sites for Dearomatization
作者:Xue Zhang、Liang Ling、Meiming Luo、Xiaoming Zeng
DOI:10.1002/anie.201907457
日期:2019.11.18
Reported here is a straightforward process in which a cyclic (alkyl)(amino)carbene/Rh catalyst system facilitates the preferential addition of hydrogen to the substitutionsites of difluoromethylated and trifluoromethylated arenes and heteroarenes, leading to dearomative reduction. This strategy enables the diastereoselective synthesis of cis-difluoromethylated and cis-trifluoromethylated cycloalkanes
Formamide catalyzed activation of carboxylic acids – versatile and cost-efficient amidation and esterification
作者:Peter H. Huy、Christelle Mbouhom
DOI:10.1039/c9sc02126d
日期:——
A novel, broadly applicable method for amide C–N and ester C–O bond formation is presented based on formylpyrrolidine (FPyr) as a Lewis base catalyst. Herein, trichlorotriazine (TCT), which is the most cost-efficient reagent for OH-group activation, was employed in amounts of ≤40 mol% with respect to the starting material (100 mol%). The new approach is distinguished by excellent cost-efficiency, waste-balance
[EN] METHODS FOR HYDROAMINOALKYLATION OF OLEFINS AND GROUP 4 METAL COMPLEXES USEFUL IN SUCH METHODS<br/>[FR] PROCÉDÉS D'HYDROAMINOALKYLATION D'OLÉFINES ET COMPLEXES MÉTALLIQUES DU GROUPE 4 UTILES DANS LESDITS PROCÉDÉS
申请人:UNIV BRITISH COLUMBIA
公开号:WO2022133594A1
公开(公告)日:2022-06-30
The present disclosure relates to methods for the hydroaminoalkylation of an olefin. Such methods can comprise reacting the olefin with a secondary amine in the presence of a catalyst of Formula (I). The present disclosure also relates to catalysts which can be useful in such methods. LxM(R1)y(I)