Palladium-Catalyzed Direct Approach to α-Trifluoromethyl Alcohols by Selective Hydroxylfluorination of <i>gem</i>
-Difluoroalkenes
作者:Bin Zhang、Xiaofei Zhang、Jian Hao、Chunhao Yang
DOI:10.1002/ejoc.201800468
日期:2018.9.30
A mild and efficient synthesis of α‐trifluoromethyl alcohols derivatives was achieved via Pd‐catalyzed selective hydroxylfluorination of gem‐difluoroalkenes using NFSI as the fluoride source.
Development of fluorination methods using continuous-flow microreactors
作者:Marcus Baumann、Ian R. Baxendale、Laetitia J. Martin、Steven V. Ley
DOI:10.1016/j.tet.2009.05.083
日期:2009.8
The safe and reliable use of various fluorination methods including nucleophilic fluorination (DAST), trifluoromethylation (Ruppert's reagent) and electrophilic fluorination (Selectfluor®) in a continuous-flow microreactor is reported. Special attention was given to the use of in-line scavenging procedures in order to obtain clean products without the need for further purification.
Provided is a kynurenine production inhibitor comprising a nitrogen-containing heterocyclic compound represented by formula (I):
(wherein R
50
and R
51
may be the same or different and each represent a hydrogen atom or the like, G
1
and G
2
may be the same or different and each represent a nitrogen atom or the like, X represents formula (III):
(wherein m
1
and m
2
may be the same or different and each represent an integer of 0 or 1, Y represents an oxygen atom or the like, and R
6
and R
7
may be the same or different and each represent a hydrogen atom or the like),
R
1
represents optionally substituted lower alkyl or the like, R
2
represents a hydrogen atom or the like, and R
3
represents optionally substituted lower alkyl or the like), and the like.
Photoredox-Catalyzed Ring-Opening Addition Reaction between Benzyl Bromides and Cyclic Ethers
作者:Jinbo Hu、Cuiwen Kuang、Chuanfa Ni、Yucheng Gu
DOI:10.1055/a-1671-6856
日期:2022.3
A novel nucleophilic reaction between cyclic ethers and benzylbromides is achieved under photoredox catalysis. The reaction proceeds through a single-electron-transfer (SET) pathway rather than a common SN2 mechanism. By two steps of reduction and oxidation, a benzylbromide heterolyzes to give a carbocation and bromide ion under mild conditions, and then a cyclic ether captures both the carbocation
Provided is a kynurenine production inhibitor comprising a nitrogen-containing heterocyclic compound represented by formula (I):
(wherein R50 and R51 may be the same or different and each represent a hydrogen atom or the like, G1 and G2 may be the same or different and each represent a nitrogen atom or the like, X represents formula (III):
(wherein m1 and m2 may be the same or different and each represent an integer of 0 or 1, Y represents an oxygen atom or the like, and R6 and R7 may be the same or different and each represent a hydrogen atom or the like),
R1 represents optionally substituted lower alkyl or the like, R2 represents a hydrogen atom or the like, and R3 represents optionally substituted lower alkyl or the like), and the like.