合成了标题化合物,并研究了它们在溶液中(NMR和DFT),在气相(DFT)中以及对于其中一些在固态(X射线)中的结构和构象行为。使用可变温度NMR光谱确定八元环的构象平衡和构象变化的活化能。聚结效应被分配给手性基态构象的外消旋化,该手性基态构象在38–100 kJ mol –1的范围内具有环反转势垒,这取决于两个强构象约束条件的相对设置:苯并环化和酰胺功能。第二个构象过程,即苯并[ c ]偶氮素-3-one,苯并[观察到d ]偶氮星-2-酮和苯并[ d ]偶氮星-4-酮。通过分析实验数据和计算得出的NMR数据,阐明了溶液中观察到的构象异构体的性质。结合先前关于(Z,Z)-环辛二烯及其苯并类似物的实验和理论数据讨论了目前的结果。
Et<sub>2</sub>Zn-Mediated Rearrangement of Bromohydrins
作者:Lezhen Li、Peijie Cai、Qingxiang Guo、Song Xue
DOI:10.1021/jo800231s
日期:2008.5.1
and highly efficient method for the rearrangement of bromohydrins mediated by Et2Zn to synthesize carbonylcompounds was described. Various β-bromo alcohols were treated with 0.6 equiv of Et2Zn to form a zinc complex in CH2Cl2 at room temperature for 2 h, followed by 1,2-migration to give the corresponding carbonylcompounds. This remarkable and clean rearrangement is general for acyclic and cyclic bromohydrins
MODULATORS OF GLUCOCORTICOID RECEPTOR, AP-1, AND/OR NF-kB ACTIVITY AND USE THEREOF
申请人:Weinstein David S.
公开号:US20090075995A1
公开(公告)日:2009-03-19
Novel non-steroidal compounds are provided which are useful in treating diseases associated with modulation of the glucocorticoid receptor, AP-1, and/or NF-κB activity, including inflammatory and immune diseases, having the structure of formula (I):
an enantiomer, diastereomer, or tautomer thereof, or a prodrug ester thereof, or a pharmaceutically-acceptable salt thereof, in which:
Z is heterocyclo or heteroaryl;
A is a 5- to 8-membered carbocyclic ring or a 5- to 8-membered heterocyclic ring;
B is a cycloalkyl, cycloalkenyl, aryl, heterocyclo, or heteroaryl ring, wherein each ring is fused to the A ring on adjacent atoms and optionally substituted by one to four groups which are the same or different and are independently selected from R
5
, R
6
, R
7
, and R
8
;
J
1
, J
2
, and J
3
are at each occurrence the same or different and are independently -A
1
QA
2
-; Q is a bond, O, S, S(O), or S(O)
2
; A
1
and A
2
are the same or different and are at each occurrence independently selected from a bond, C
1-3
alkylene, substituted C
1-3
alkylene, C
2-4
alkenylene, and substituted C
2-4
alkenylene, provided that A
1
and A
2
are chosen so that ring A is a 5- to 8-membered carbocyclic or heterocyclic ring;
R
1
to R
11
are as defined herein.
Also provided are pharmaceutical compositions and methods of treating inflammatory- or immune-associated diseases and obesity and diabetes employing said compounds.
Oxidative conversion of β-hydroxyselenides to epoxides and ketones with meta-chloroperbenzoic acid
作者:Sakae Uemura、Kouichi Ohe、Nobuyuki Sugita
DOI:10.1039/c39880000111
日期:——
Treatment of β-hydroxy-primary-alkyl and β-hydroxy-β-phenyl-primary-alkyl selenides with 3–5 equiv. of meta-chloroperbenzoicacid in methanol or tetrahydrofuran gives the corresponding epoxides and phenyl migrated ketones, respectively, in high yields.
Application of [Hydroxy(tosyloxy)iodo]benzene in the Wittig-Ring Expansion Sequence for the Synthesis of β-Benzocyclo-alkenones from α-Benzocycloalkenones
作者:M. Justik、G. Koser
DOI:10.3390/10010217
日期:——
beta-benzocyclo-alkenones containing six, seven and eight-membered rings is reported. This was accomplished via a Wittig olefination-oxidative rearrangement sequence using[hydroxy(tosyloxy)iodo]-benzene (HTIB) is the oxidant, that enables the synthesis of regioisomeric pairs of methyl-substituted beta-benzocycloalkenones. The incorporation of carbon-13 at C-1 of the beta-tetralone nucleus was also demonstrated. The
decay pathways were investigated theoretically. Bridged stilbenes with short alkyl chains exhibited a strong fluorescence emission in solution and in the solidstate, while bridged stilbenes with long alkyl chains exhibited AIE. Based on this theoretical prediction, we developed the bridged stilbenes BPST[7] and DPB[7], which demonstrate excellent AIE behavior.