Easy synthesis of 2,4-dialkyl substituted phenols and anisoles from p-bensoquinone
摘要:
The reaction of p-benzoquinone (1) with several organolithium compounds (methyl-, ethyl-, n-butyl, phenyllithium) leads directly, after acid hydrolysis, to the corresponding 2,4-dialkylphenols 4a-d, resulting from a rearrangement/aromatization process of the corresponding intermediate diols 3. The use of two different alkyllithium reagents leads to the mixed products 4e.f. Alternatively, the same results are obtained treating the crude isolated diols 3 with a catalytic amount of concentrated sulfuric acid. Applying this last methodology to the diethers 2, 2,4-dialkylanisoles 8 are obtained. A possible mechanism is proposed.
[EN] APOPTOSIS INHIBITORS<br/>[FR] INHIBITEURS DE L'APOPTOSE
申请人:NAT INSTITUTE OF BIOLOGICAL SCIENCES BEIJING
公开号:WO2018014802A1
公开(公告)日:2018-01-25
The invention provides compounds that are inhibitors or covalent modifiers of succinate dehydrogenase subunit B (SDHB) and/or inhibitors of apoptosis, and pharmaceutically acceptable salts, hydrides and stereoisomers thereof. The compounds are employed in pharmaceutical compositions, and methods of making and use, including treating a person in need thereof with an effective amount of the compound or composition.
[EN] DIARYLACETYLENE HYDRAZIDE CONTAINING TYROSINE KINASE INHIBITORS<br/>[FR] INHIBITEURS DE TYROSINE KINASE CONTENANT UN DIARYLACÉTYLÈNE HYDRAZIDE
申请人:SUN PHARMA ADVANCED RES CO LTD
公开号:WO2012098416A1
公开(公告)日:2012-07-26
The present invention relates to novel diarylacetylene hydrazide compounds of formula (I) or pharmaceutically acceptable salt thereof, as tyrosine kinase inhibitors, the process for their preparation, and to the use of the compounds of formula (I) in the preparation of pharmaceutical compositions for the therapeutic treatment of disorders related to tyrosine kinases, in warm-blooded animals
Trityl Derivatives for Enhancing Mass Spectrometry
申请人:Southern Edwin Mellor
公开号:US20090023926A1
公开(公告)日:2009-01-22
The present invention provides a compound of the formula: (IIa); having a reactive functional group M, capable of reacting with a biopolymer, BP, having at least one group capable of reacting with M to form a covalent linkage, to provide a biopolymer derivative of the formula: (IIIa). The biopolymer derivatives of the invention have enhanced ionisability with respect to free 10 biopolymer (Bp) enabling improved analysis of the biopolymer using mass spectrometry. The invention further provides specific examples of compounds formula (IIa), e.g. compounds of formula: (IIa-2
a
) and (IIa-58
a
).