Utilization of the 1,2,3,5-thiatriazolidin-3-one 1,1-dioxide scaffold in the design of potential inhibitors of human neutrophil proteinase 3
摘要:
The S' subsites of human neutrophil proteinase 3 (Pr 3) were probed by constructing diverse libraries of compounds based on the 1,2,3,5-thiatriazolidin-3-one 1,1-dioxide using combinational and click chemistry methods. The multiple points of diversity embodied in the heterocyclic scaffold render it well-suited to the exploration of the S' subsites of Pr 3. Molecular modeling studies suggest that further exploration of the S' subsites of Pr 3 using the aforementioned heterocyclic scaffold may lead to the identification of highly selective, reversible competitive inhibitors of Pr 3. (C) 2009 Elsevier Ltd. All rights reserved.
reaction of olefin with dpRe (k4) and the slow step to the analogous reaction with mpRe (k3). In most of the tudied ionicliquids, k4 approximately 5 x k3. 2H NMR experiments conducted with [D3]dpRe under non-steady-state conditions confirm the speciation of the catalytic system in ionicliquids and assert the validity of the UV/Vis kinetics. Deuteriated alkenes were used to study the catalytic epoxidation
研究了从离子液体中甲基三氧杂or(MTO)的过氧配合物到烯烃的氧原子转移动力学。在360 nm处通过UV / Vis监测烯烃到环氧化物的非催化转化,单过氧or(mpRe)和二过氧or(dpRe)络合物在其中吸收。通过MTO和尿素过氧化氢(UHP)在无水THF中的反应原位制备无水和无过氧化物的dpRe。观察到的双指数时间曲线与动力学模型相结合,可以将快速步骤分配给烯烃与dpRe(k4)的反应,将缓慢步骤分配给与mpRe(k3)的类似反应。在大多数的离子液体中,k4约为5 x k3。在非稳态条件下用[D3] dpRe进行的2H NMR实验证实了离子液体中催化体系的形态,并证明了UV / Vis动力学的有效性。用氘代烯烃通过2 H NMR光谱研究烯烃的催化环氧化和二羟基化。在几种离子液体中,α-甲基苯乙烯的k4值比乙腈中的k4值高一个数量级。尽管烯烃环氧化的速率不受离子液体阳离子的性质影响,但观
AGRICULTURAL CHEMICALS
申请人:REDAG CROP PROTECTION LTD
公开号:US20160214945A1
公开(公告)日:2016-07-28
The present invention relates to compounds which are of use in the field of agriculture as herbicides. The invention also relates to compositions comprising said compounds and methods of using said compounds.
Ten different fluorinated aromatic epoxides have been tested as potential substrates for halohydrin dehalogenase (HHDH) HheC. The majority of investigated epoxides are useful building blocks in synthetic chemistry applications, with a number of them being polysubstituted. Moderate to high enantioselectivities (ER = 15 → 200) were observed in azidolysis, allowing the synthesis of enantioenriched (R)-azido