Oxidation Strategy for the Synthesis of Regioisomeric Spiroisobenzofuranopyrroles: Facile Entries to Spiro[isobenzofuran-1,2′-pyrrole] and Spiro[isobenzofuran-1,3′-pyrrole] Derivatives
developed to synthesize two kinds of racemic spiroisobenzofuranopyrrole analogues as regioisomers. In the presence of sodiumperiodate, cis-indeno[1,2-b]pyrrol-4(1H)-ones were converted into spiro[isobenzofuran-1,2′-pyrrole] derivatives by a two-step process. In addition, oxidative reactions promoted by lead tetraacetate were demonstrated using cis-indeno[2,1-b]pyrrol-8(1H)-ones as substrates, affording
Isomerization of Ninhydrin-Heterocyclic Ketene Aminal Adducts: Kinetic versus Thermodynamic Control, Solvent Dependency and Mechanism
作者:Nanyang Chen、Minming Zou、Xue Tian、Fengjuan Zhu、Danping Jiang、Jiagao Cheng、Xusheng Shao、Zhong Li
DOI:10.1002/ejoc.201402677
日期:2014.10
Ninhydrin and heterocyclic ketene aminals (HKAs) are versatile building blocks in organic chemistry. Reactions of ninhydrin with HKAs initially produced the kinetic products indeno[1,2-b]pyrrol-4(1H)-one derivatives, which could further isomerize to thermodynamic counterparts indeno[2,1-b]pyrrol-8(1H)-ones. The isomerization showed a strong solvent dependency and occurred through a decomposition–reconstruction
Organocatalytic Michael addition of 2-nitro methylene imidazolidines to α,β-unsaturated aldehydes: concise synthesis of chiral insecticide Paichongding
作者:Yanpeng Lou、Yin Xu、Zhuo Chai、Xusheng Shao、Gang Zhao、Zhong Li
DOI:10.1016/j.tet.2015.07.056
日期:2015.9
An organocatalyticMichael reaction of 2-nitro methylene imidazolidines to α,β-unsaturatedaldehydes followed by acetal-amination affords hexahydroimidazo[1,2-a]pyridines in high yields and with moderate to excellent enantioselectivity. The utility of the reaction was illustrated by a one-step transformation to Paichongding, an insecticide of the neonicotinoid family.
2-硝基亚甲基咪唑烷对α,β-不饱和醛的有机催化迈克尔反应,然后进行乙缩醛胺化,可高产率地得到六氢咪唑并[1,2- a ]吡啶,并且具有中等至优异的对映选择性。通过一步转化为新烟碱类杀虫剂Paichongding可以说明该反应的实用性。
Design, Synthesis, and Insecticidal Activities of Novel Analogues of Neonicotinoids: Replacement of Nitromethylene with Nitroconjugated System
作者:Xusheng Shao、Zhong Li、Xuhong Qian、Xiaoyong Xu
DOI:10.1021/jf803305f
日期:2009.2.11
To replace nitromethylene pharmacophore with a nitroconjugated system, a series of novelneonicotinoid analogues bearing five-membered aromatic heterocycles were designed and synthesized. Bioassays indicated that some of the synthesized compounds exhibited higher insecticidal activities than imidacloprid against cowpea aphids (Aphis craccivora), armyworm (Pseudaletia separate Walker), Nephotettix bipunctatus
[EN] HETEROCYCLIC SULFONAMIDE DERIVATIVES USEFUL AS MEK INHIBITORS<br/>[FR] DERIVES SULFONAMIDES HETEROCYCLIQUES UTILISES COMME INHIBITEURS DE MEK
申请人:NOVARTIS AG
公开号:WO2011054828A1
公开(公告)日:2011-05-12
The present invention relates to compounds of Formula (IA) Where R1a, R1b, X, R2a, R2b, W, R3, R4, and R5 are as defined herein as well as pharmaceutically acceptable salts thereof. The compounds have been shown to act as MEK inhibitors which may be useful in the treatment of hyperproliferative diseases, like cancer and inflammation.