Preparation of Functionalized Diaryl- and Diheteroaryllanthanum Reagents by Fast Halogen-Lanthanum Exchange
作者:Andreas D. Benischke、Lucile Anthore-Dalion、Guillaume Berionni、Paul Knochel
DOI:10.1002/anie.201709553
日期:2017.12.18
Aryl and heteroaryl halides (X=Br, I) undergo a fast and convenient halogen–lanthanum exchange with nBu2LaMe, which leads to functionalized diaryl‐ and diheteroaryllanthanum derivatives. Subsequent trapping reactions with selected electrophiles, such as ketones, aldehydes, or amides, proceeded smoothly at −50 °C in THF, affording polyfunctionalized alcohols and carbonyl derivatives. Kinetic competition
Expedient Preparation of Aryllithium and Arylzinc Reagents from Aryl Chlorides Using Lithium 4,4′-Di-tert-Butylbiphenylide and Zinc(II) Chloride
作者:Paul Knochel、Zhi-Liang Shen、Korbinian Sommer
DOI:10.1055/s-0034-1380697
日期:——
aryllithium and zinc reagents from inexpensive and readily available arylchlorides by using lithium 4,4′-di-tert-butylbiphenylide (LiDBB) as a lithiation reagent. The resulting organometallic reagents underwent subsequent reactions with a variety of electrophiles, such as an aldehydes, DMF, PhSSO2Ph, TsCN, an aryl halide, or an acid chloride (through Pd-catalyzed cross-coupling). Arylchlorides bearing substituents
[EN] CONDENSED IMIDAZOLE DERIVATIVES SUBSTITUTED BY TERTIARY HYDROXY GROUPS AS PI3K-GAMMA INHIBITORS<br/>[FR] DÉRIVÉS D'IMIDAZOLE CONDENSÉS, SUBSTITUÉS PAR DES GROUPES HYDROXY TERTIAIRES, UTILISÉS COMME INHIBITEURS DE PI3K-GAMMA
申请人:INCYTE CORP
公开号:WO2019079469A1
公开(公告)日:2019-04-25
This application relates to compounds of Formula (I): or pharmaceutically acceptable salts thereof, which are inhibitors of PI3K-y which are useful for the treatment of disorders such as autoimmune diseases, cancer, cardiovascular diseases, and neurodegenerative diseases.
With the assistance of a practical directing group (COAQ), the first catalytic protocol for the palladium-catalyzed C(sp3)–H monoarylation of methanol has been developed, offering an invaluable synthesis means to establish extensive derivatives of crucial arylmethanol functional fragments. Furthermore, the gram-scale reaction, broad substrate scope, excellent functional group compatibility, and even
N-Iodosuccinimide (NIS) in pure trifluoroacetic acid (TFA) offers a time-efficient and general method for the iodination of a wide range of mono- and disubstituted benzenes at room temperature, as demonstrated in this paper. The starting materials were generally converted into mono-iodinated products in less than 16 hours at room temperature, without byproducts. A few deactivated substrates needed