[EN] THIOPHENE DERIVATIVES FOR THE TREATMENT OF DISORDERS CAUSED BY IGE<br/>[FR] DÉRIVÉS DE THIOPHÈNE POUR LE TRAITEMENT DE TROUBLES PROVOQUÉS PAR IGE
申请人:UCB BIOPHARMA SRL
公开号:WO2019243550A1
公开(公告)日:2019-12-26
Thiophene derivatives of formula (I) and a pharmaceutically acceptable salt thereof are provided. These compounds have utility for the treatment or prevention of disorders caused by IgE, such as allergy, type 1 hypersensitivity or familiar sinus inflammation.
Conversion of cycloalk-2-enones into 2-methylcycloalkane-1,3-diones—assessment of various Tamao-Fleming procedures and mechanistic insight into the use of the Me<sub>3</sub>SiMe<sub>2</sub>Si unit
作者:Guojun Yu、Derrick L. J. Clive
DOI:10.1039/c5ob02402a
日期:——
2-Methyl cycloalkane-1,3-diones can be made by conjugate addition of Me3SiMe2SiLi to cycloalk-2-en-1-ones, ketalization, Tamao–Fleming oxidation (Bu4NF, then H2O2, KHCO3), TPAP oxidation and acid hydrolysis.
High-Throughput Screening of the Asymmetric Decarboxylative Alkylation Reaction of Enolate-Stabilized Enol Carbonates
作者:Brian Stoltz、Nolan McDougal、Scott Virgil
DOI:10.1055/s-0030-1258094
日期:2010.7
The use of high-throughput screening allowed for the optimization of reaction conditions for the palladium-catalyzed asymmetric decarboxylative alkylation reaction of enolate-stabilized enol carbonates. Changing to a nonpolar reaction solvent and to an electron-deficient PHOX derivative as ligand from our standard reaction conditions improved the enantioselectivity for the alkylation of a ketal-protected,1,3-diketone-derived enol carbonate from 28% ee to 84% ee. Similar improvements in enantioselectivity were seen for a β-keto ester derived and an α-phenyl cyclohexanone-derived enol carbonate.
利用高通量筛选技术优化了钯催化烯醇稳定烯醇碳酸盐不对称脱羧烷基化反应的反应条件。将标准反应条件改为非极性反应溶剂和缺电子的 PHOX 衍生物作为配体后,酮保护的 1,3-二酮衍生烯醇碳酸酯烷基化反应的对映体选择性从 28% ee 提高到 84%ee。δ-酮酯衍生的烯醇碳酸酯和δ-苯基环己酮衍生的烯醇碳酸酯的对映体选择性也有类似的改善。
Subramanian, G.; Ramakrishnan, V.T.; Rajagopalan, K., Synthetic Communications, 1990, vol. 20, # 13, p. 2019 - 2032
作者:Subramanian, G.、Ramakrishnan, V.T.、Rajagopalan, K.
DOI:——
日期:——
Direct asymmetric α-hydroxylation of 2-hydroxymethyl ketones
作者:Anne Paju、Tõnis Kanger、Tõnis Pehk、Margus Lopp
DOI:10.1016/s0040-4020(02)00760-3
日期:2002.9
A direct alpha-hydroxylation of racemic 2-hydroxymethyl ketones with the Sharpless epoxidation catalyst resulted in alpha,beta-dihydroxy ketones in high ee (up to 97%) and in moderate to good isolated yield (up to 58%). (C) 2002 Elsevier Science Ltd. All rights reserved.