m-Azipropofol (AziPm) a Photoactive Analogue of the Intravenous General Anesthetic Propofol
摘要:
Propofol is the most commonly used sedative-hypnotic drug for noxious procedures, yet the molecular targets underlying either its beneficial or toxic effects remain uncertain. In order to determine targets and thereby mechanisms of propofol, we have synthesized a photoactivateable analogue by substituting an alkyldiazirinyl moiety for one of the isopropyl arms but in the meta position. m-Azipropofol retains the physical, biochemical, GABA(A) receptor modulatory, and in vivo activity of propofol and photoadducts to amino acid residues in known propofol binding sites in natural proteins. Using either mass spectrometry or radiolabeling, this reagent may be used to reveal sites and targets that underlie the mechanism of both the desirable and undesirable actions of this important clinical compound.
Compounds having the following formula (I) and methods of their use and preparation are disclosed:
具有以下化学式(I)的化合物以及它们的使用和制备方法已被披露:
Synthesis of highly substituted oxetanes via [2+2] cycloaddition reactions of allenoates catalyzed by a guanidine Lewis base
作者:Philipp Selig、Aleksej Turočkin、William Raven
DOI:10.1039/c3cc40855h
日期:——
The first synthesis of highly substituted 3-alkyl-oxetan-2-ylidenes from allenoates was developed by using the bicyclic guanidine 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) as an exceptionally active nitrogen Lewis base catalyst.
Molecular and Merrifield supported chiral diamines for enantioselective addition of ZnR2 (R = Me, Et) to ketones
作者:Mercedes Calvillo-Barahona、Carlos Cordovilla、Miroslav N. Genov、Jesús M. Martínez-Ilarduya、Pablo Espinet
DOI:10.1039/c3dt51097b
日期:——
reported as active catalysts in the enantioselective addition reactions of ZnR2 to either methyl- or trifluoromethyl-ketones. Subtle changes in the molecular structure of different catalysts are described herein and lead to a dramatic effect in their catalyticactivity. From these findings, we demonstrate the selective reactivity of the ligands used in the addition of ZnR2 (R = Me, Et) to methyl- and tri
Highly enantioselective addition of dimethylzinc to fluorinated alkyl ketones, and the mechanism behind it
作者:Tomaz Neves-Garcia、Andrea Vélez、Jesús M. Martínez-Ilarduya、Pablo Espinet
DOI:10.1039/c8cc06358c
日期:——
Chiral-diamine catalyzed addition of ZnMe2 to PhC(O)CF2X (in dichloromethane at −30 °C) affords fluorinated alkyl tertiary alcohols in high yield (quantitative for X = H, F, Cl; 84% for X = CF3) and up to 99% ee. These conditions are similarly very efficient for other various ArC(O)CF3 molecules. A fine analysis of the results can be performed based on a double-cycle mechanism.
将手性二胺催化的ZnMe 2加到PhC(O)CF 2 X中(在-30°C的二氯甲烷中),可以得到高产率的氟化烷基叔醇(X = H,F,Cl定量; X = CF的定量为84%)3)和高达99%的ee。这些条件对于其他各种ArC(O)CF 3分子同样非常有效。可以基于双循环机制对结果进行精细分析。
A Chiral Pentafluorinated Isopropyl Group via Iodine(I)/(III) Catalysis
作者:Stephanie Meyer、Joel Häfliger、Michael Schäfer、John J. Molloy、Constantin G. Daniliuc、Ryan Gilmour
DOI:10.1002/anie.202015946
日期:2021.3.15
catalysis strategy to construct an enantioenriched fluorinated isostere of the iPr group is reported. The difluorination of readily accessible α‐CF3‐styrenes is enabled by the in situ generation of a chiral ArIF2 species to forge a stereocentre with the substituents F, CH2F and CF3 (up to 95 %, >20:1 vicinal:geminal difluorination). The replacement of the metabolically labile benzylic proton results
报道了构建 Pr 基团的对映体富集氟化等排体的 I(I)/(III) 催化策略。通过原位生成手性 ArIF 2物质,可实现易于接近的 α-CF 3 -苯乙烯的二氟化,从而与取代基 F、CH 2 F 和 CF 3形成立构中心(高达 95 %,>20:1邻位) :偕二氟化)。通过X射线晶体学(π→σ*和立体电子gauche σ→σ*相互作用)确定,代谢不稳定的苄基质子的替代产生了高度预组织的支架。公开了一种催化剂编辑方法,其中对映选择性的初步验证是建立在结构基础上的。