Highly Enantioselective Pd-Catalyzed Asymmetric Hydrogenation of Activated Imines
作者:You-Qing Wang、Sheng-Mei Lu、Yong-Gui Zhou
DOI:10.1021/jo0700878
日期:2007.5.1
complexes are highly effective catalysts for asymmetrichydrogenation of activated imines in trifluoroethanol. The asymmetrichydrogenation of N-diphenylphosphinyl ketimines 3 with Pd(CF3CO2)/(S)-SegPhos indicated 87−99% ee, and N-tosylimines 5 could gave 88−97% ee with Pd(CF3CO2)/(S)-SynPhos as a catalyst. CyclicN-sulfonylimines 7 and 11 were hydrogenated to afford the useful chiral sultam derivatives in
Pd /双膦配合物是用于活化的亚胺在三氟乙醇中不对称氢化的高效催化剂。Pd(CF 3 CO 2)/(S)-SegPhos对N-二苯基亚膦酰基酮亚胺3的不对称氢化表明ee为87-99%,N- tosylimines 5与Pd(CF 3 CO 2)可以得到88-97%ee /(S)-SynPhos作为催化剂。环状N-磺酰亚胺7和11 进行氢化,以79-93%ee的比重得到有用的手性舒马坦衍生物,这是重要的有机合成中间体和农业和医药制剂的结构单元。
Synthesis of Sultams and Cyclic <i>N</i>-Sulfonyl Ketimines via Iron-Catalyzed Intramolecular Aliphatic C–H Amidation
作者:Dayou Zhong、Di Wu、Yan Zhang、Zhiwu Lu、Muhammad Usman、Wei Liu、Xiuqiang Lu、Wen-Bo Liu
DOI:10.1021/acs.orglett.9b01732
日期:2019.8.2
unique role in drug discovery and synthetic chemistry. A direct synthesis of sultams by an intramolecular C(sp3)–H amidation reaction using an iron complex in situ derived from Fe(ClO4)2 and aminopyridine ligand is reported. This strategy features a readily available catalyst and tolerates a broad variety of substrates as demonstrated by 22 examples (up to 89% yield). A one-pot iron-catalyzed amidation/oxidation
[EN] 6,7-DIHYDRO-4H-PYRAZOLO[1,5-A]PYRAZINE AND 6,7-DIHYDRO-4H-TRIAZOLO[1,5-A]PYRAZINE COMPOUNDS FOR THE TREATMENT OF INFECTIOUS DISEASES<br/>[FR] COMPOSÉS 6,7-DIHYDRO-4H-PYRAZOLO[1,5-A]PYRAZINE AND 6,7-DIHYDRO-4H-TRIAZOLO[1,5-A]PYRAZINE POUR LE TRAITEMENT DES MALADIES INFECTIEUSES
申请人:HOFFMANN LA ROCHE
公开号:WO2018011163A1
公开(公告)日:2018-01-18
The present invention relates to compounds of the formula (I), or pharmaceutically acceptable salts, enantiomer or diastereomer thereof, wherein R1 to R4 and Q are as described above. The compounds may be useful for the treatment or prophylaxis of hepatitis B virus infection.
[EN] CARBONITRILE DERIVATIVES AS SELECTIVE ANDROGEN RECEPTOR MODULATORS<br/>[FR] DÉRIVÉS CARBONITRILES EN TANT QUE MODULATEURS SÉLECTIFS DU RÉCEPTEUR DES ANDROGÈNES
申请人:PFIZER
公开号:WO2015181676A4
公开(公告)日:2016-02-04
Synthesis of chiral γ -sultams through intramolecular reductive amination with sulfonylcarbamate as N- source
An efficient and enantioselective palladium-catalyzed intramolecular asymmetric reductive amination with sulfonylcarbamates as N-sources was reported, providing a facile and general access to the chiral gamma-sultam derivatives with up to 97% of enantioselectivity. This tandem process avoids additional deprotection manipulation and arduous isolation of the N-sulfonyl-imine intermediates. (C) 2017 Elsevier Ltd. All rights reserved.