A novel approach to the synthesis of benzoic and cinnamic acid derivatives with nor-isoprenoid substituents
摘要:
A novel strategy for the synthesis of 4-(nor-polyprenyl)-substituted benzoic acids and their esters of the general formula 1 as well as their vinylogs of the type 2, based on the use of terephthalic aldehyde (3) and its tetramethyl acetal (13), is elaborated. The carbonyl groups in dialdehydes 3 and 12 can be selectively involved in the reaction sequences leading to the introduction of both aliphatic and functional substituents in positions 1 and 4 of the benzene ring.
A compound having immunosuppressive activity with low toxicity or a pharmacological salt thereof. The compound has a general formula (I) shown below or a pharmacologically acceptable salt thereof, or a pharmacologically acceptable prodrug thereof
Antibacterial compounds of formula (I) are provided:
as well as stereoisomers, pharmaceutically acceptable salts, esters, and prodrugs thereof; pharmaceutical compositions comprising such compounds; methods of treating bacterial infections by the administration of such compounds; and processes for the preparation of such compounds.
Method of inhibiting neurotrophin-receptor binding
申请人:Ross Gregory M.
公开号:US20090215814A1
公开(公告)日:2009-08-27
The present invention relates to compositions which inhibit the binding of nerve growth factor to the p75
NTR
common neurotrophin receptor and methods of use thereof. In one embodiment, the compound which inhibits binding of nerve growth factor to p75
NTR
comprises, particularly when bound to nerve growth factor, at least two of the following: (1) a first electronegative atom or functional group positioned to interact with Lys
34
of nerve growth factor; (2) a second electronegative atom or functional group positioned to interact with Lys
95
of nerve growth factor; (3) a third electronegative atom or functional group positioned to interact with Lys
88
of nerve growth factor; (4) a fourth electronegative atom or functional group positioned to interact with Lys
32
of nerve growth factor; and (5) a hydrophobic moiety which interacts with the hydrophobic region formed by Ile
31
, Phe
101
and Phe
86
of nerve growth factor.
Rhodium(II)-Catalyzed Enantioselective Intermolecular Aziridination of Alkenes
作者:Vincent Boquet、Ali Nasrallah、Alejandro L. Dana、Erwan Brunard、Pablo H. Di Chenna、Fernando J. Duran、Pascal Retailleau、Benjamin Darses、Marie Sircoglou、Philippe Dauban
DOI:10.1021/jacs.2c07337
日期:2022.9.21
dirhodium(II) tetracarboxylates are highly efficient catalysts for the asymmetric intermolecular aziridination of substituted alkenes with sulfamates. The reaction proceeds with high levels of efficiency and chemoselectivity to afford aziridines with excellent yields of up to 95% and enantiomeric excesses of up to 99%. The scope of the alkene aziridination includes mono-, di-, and trisubstituted olefins as well
Exploring the Factors which Result in Cytochrome P450 Catalyzed Desaturation Versus Hydroxylation
作者:Tom Coleman、Daniel Z. Doherty、Ting Zhang、Matthew N. Podgorski、Ruihong Qiao、Joel H. Z. Lee、John B. Bruning、James J. De Voss、Weihong Zhou、Stephen G. Bell
DOI:10.1002/asia.202200986
日期:2022.12.14
The enzyme catalyzed oxidation of alkyl substituted substrates results in significant changes in the regioselectivity of hydroxylation, and in the relative levels of desaturated alkene product. Using X-ray crystal structures and protein engineering we reveal that the position of the alkyl group relative to the heme and the C−H bond strengths are important in determining these outcomes.
烷基取代底物的酶催化氧化导致羟基化的区域选择性和去饱和烯烃产物的相对水平发生显着变化。使用 X 射线晶体结构和蛋白质工程,我们揭示了烷基相对于血红素的位置和 C−H 键强度对于确定这些结果很重要。