The synthesis of various new 1-aminated-2,5-cyclohexadienes is described. These reagents can be used in radical transfer hydroaminations of unactivated and electron-rich double bonds. With thiols as polarity reversal catalysts good yields are obtained. The radical hydroamination occurs with good to excellent anti-Markovnikov selectivity. Many functional groups such as alcohols, silyl ethers, phosphonates
[EN] LARGE CONDUCTANCE CALCIUM-ACTIVATED K CHANNEL OPENER<br/>[FR] ELEMENT D'OUVERTURE DE CANAL K, ACTIVE PAR DU CALCIUM, A CONDUCTANCE ELEVEE
申请人:TANABE SEIYAKU CO
公开号:WO2004035570A1
公开(公告)日:2004-04-29
There are disclosed a large conductance calcium-activated K channel opener comprising a compound of the formula (I): wherein ring A is a 5-membered heterocyclic ring containing any one of O, N or S, which ring may be substituted by R4, R1 is aryl, heterocyclic or heterocycle-substituted carbonyl; R2 is hydrogen, halogen, carboxy, amino, alkyl, alkoxycarbonyl, alkenyl or cycloalkyl; R3 is aryl, heterocyclic or alkyl; and R4 is hydrogen or alkyl, each of substituents may be substituted, or a pharmaceutically acceptable salt thereof as an active ingredient.
Alkyl 3-Nitroacrylates in Reactions with Substituted Hydrazines
作者:V. V. Pelipko、I. S. Adyukov、R. I. Baichurin、S. V. Makarenko
DOI:10.1134/s1070363222020013
日期:2022.2
Abstract The reactions of alkyl 3-nitroacrylates with representatives of aryl(hetaryl) carboxylic acid hydrazides and substituted phenylhydrazines were studied. It was shown that the reactions proceed along the path of the formation of aza-Michael adducts. Elimination of nitrous acid by the action of a base from aza-adducts leads to the formation of N′-substituted E-hydrazones of alkyl pyruvates.
Stereoselective synthesis of N-heterocycles through amine addition to nitroalkenes
作者:Lekh Nath Gautam、Qiaoyi Wang、Novruz G. Akhmedov、Jeffrey L. Petersen、Xiaodong Shi
DOI:10.1039/c3ob27452g
日期:——
An efficient route for the preparation of substituted N-heterocycles was developed through the amine addition to nitroalkenes. The reaction tolerates a large substrate scope with good to excellent yields (up to 95%) and excellent stereoselectivities (up to 99 : 1 dr).