Oxidation of α-Trifluoromethyl Alcohols Using a Recyclable Oxoammonium Salt
作者:Christopher B. Kelly、Michael A. Mercadante、Trevor A. Hamlin、Madison H. Fletcher、Nicholas E. Leadbeater
DOI:10.1021/jo301477s
日期:2012.9.21
method for the oxidation of α-trifluoromethyl alcohols to trifluoromethyl ketones (TFMKs) using the oxoammonium salt 4-acetylamino-2,2,6,6-tetramethylpiperidine-1-oxoammonium tetrafluoroborate (1) is described. Under basic conditions, oxidation proceeds rapidly and affords good to excellent yields of TFMKs, without concomitant formation of the hydrate. The byproduct of the oxidation, 4-acetylamino-2
NITROGEN-CONTAINING HETEROCYCLIC COMPOUND HAVING INHIBITORY EFFECT ON PRODUCTION OF KYNURENINE
申请人:Fukuda Yuichi
公开号:US20130065905A1
公开(公告)日:2013-03-14
The present invention provides a nitrogen-containing heterocyclic compound or a pharmaceutically acceptable salt thereof having an inhibitory effect on the production of kynurenine, represented by formula (I):
(wherein
R
6
and R
7
may be the same or different and each represent a hydrogen atom or the like,
R
8
, R
9
, R
19
, and R
11
may be the same or different and each represent a hydrogen atom or the like,
R
1
represents lower alkyl which may be substituted with cycloalkyl, or the like, and
R
3
represents optionally substituted aryl or an optionally substituted heterocyclic group).
Palladium-Catalyzed Suzuki-Miyaura Cross-Coupling of Secondary α-(Trifluoromethyl)benzyl Tosylates
作者:Marta Brambilla、Matthew Tredwell
DOI:10.1002/anie.201706631
日期:2017.9.18
palladium‐catalyzed C(sp3)−C(sp2) Suzuki–Miyaura cross‐coupling of aryl boronic acids and α‐(trifluoromethyl)benzyl tosylates is reported. A readily available, air‐stable palladium catalyst was employed to access a wide range of functionalized 1,1‐diaryl‐2,2,2‐trifluoroethanes. Enantioenriched α‐(trifluoromethyl)benzyl tosylates were found to undergo cross‐coupling to give the corresponding enantioenriched
Stille cross-coupling of secondary and tertiary α-(trifluoromethyl)-benzyl chlorides with allylstannanes
作者:Nagender Punna、Kyosuke Harada、Norio Shibata
DOI:10.1039/c8cc03541e
日期:——
A Stille cross-coupling reaction was developed that delivers for the first time trifluoromethyl-substituted homoallyl compounds from α-(trifluoromethyl)benzyl chlorides and allylstannanes. This reaction proceeds even with low catalyst loadings (1 mol%) via a rare CF3–Pd–π-benzyl intermediate.
The invention concerns a method for preparing &agr;-halogenated ketones from secondary &agr;-halogenated alcohols. More particularly, the invention concerns the preparation of &agr;-trihalogenated ketones from secondary &agr;-trihalogenated alcohols. The method for preparing said &agr;-halogenated ketone is characterized in that it consists in oxidizing in liquid phase, a secondary &agr;-halogenated alcohol, using molecular oxygen or a gas containing same, in the presence of a catalyst based on a metal M
1
selected among metals of group 1b and 8 of the periodic system of elements and optionally an activating element.