Gold-Catalyzed Hydrofluorination of Electron-Deficient Alkynes: Stereoselective Synthesis of β-Fluoro Michael Acceptors
作者:Thomas J. O’Connor、F. Dean Toste
DOI:10.1021/acscatal.8b01341
日期:2018.7.6
The gold(I)-catalyzed, stereoselective hydrofluorination of electron-deficient alkynes with triethylamine trihydrogen fluoride (Et3N·3HF) is described. Fluorinated α,β-unsaturated aldehydes, amides, esters, ketones, and nitriles were isolated in moderate to good yields as single diastereomers. In all but four cases, the (Z)-vinyl fluorides were initially formed in ≥97% diastereoselectivity. This work
The Co(II)-catalyzed selective C–H alkenylation of picolinamides with 1,3-diynes has been developed. This protocol can be applied to a variety of 1,3-diynes. In addition, both symmetrical and unsymmetrical internal alkynes were well tolerated, affording the corresponding alkenyl arenes. Moreover, control experiments indicated that C–H bond cleavage may be involved in the rate-determining step. Furthermore
The present invention relates to compounds of formula
wherein R
1
, R
2
, R
3
, R
4
, Z, and n are as defined herein
or to a pharmaceutically active salt thereof. Compounds of the invention are high potential NK-3 receptor antagonists for the treatment of depression, pain, psychosis, Parkinson's disease, schizophrenia, anxiety and attention deficit hyperactivity disorder (ADHD).
[EN] PYRROLIDINE DERIVATIVES<br/>[FR] DÉRIVÉS DE PYRROLIDINE
申请人:HOFFMANN LA ROCHE
公开号:WO2011085886A1
公开(公告)日:2011-07-21
The present invention relates to compounds of formula (I) or to a pharmaceutically active salt thereof. It has been found that the present compounds are high potential NK-3 receptor antagonists for the treatment of depression, pain, psychosis, Parkinson's disease, schizophrenia, anxiety and attention deficit hyperactivity disorder (ADHD).
Phosphine-Catalyzed Reaction of Cyanohydrins with Activated Alkynes
作者:Olivier Loreau、Frédéric Taran、Acétou Siby
DOI:10.1055/s-0029-1216827
日期:2009.7
new method for preparing α-cyanoacrylates and α-cyanoenones is described. The procedure uses a phosphine-catalyzed α-C addition of cyanide ion, generated in situ from cyanohydrins, to activated alkynes. An unexpected tandem reaction producing benzylidenecyclopentanones is also described. cyanoacrylates - alkynes - catalysis - phosphines