Regioselective Synthesis of Pyrroles from Alkyne-Isocyanide Click Reactions: An Angle Strain-Induced Bond Migration Approach
作者:Jimil George、Hun Young Kim、Kyungsoo Oh
DOI:10.1002/adsc.201601017
日期:2016.12.7
direct regioselective synthesis of highly functionalized pyrroles with two different electron‐withdrawing groups has been developed using an angle strain‐induced 1,2‐shift of an electron‐withdrawing group in 2H‐pyrroles. The preferential migration aptitude of an electron‐withdrawing group over alkyl and aryl groups is believed to be the result of the orbital overlap between the internal alkene and the
N-transfer reagent and method for preparing the same and its application
申请人:NATIONAL CHENG KUNG UNIVERSITY
公开号:US11040939B1
公开(公告)日:2021-06-22
Provided are a novel N-transfer reagent and a method for preparing the same and its application. The N-transfer reagent is represented by the following Formula (I):
The various novel N-transfer reagents of the present invention can be quickly prepared by employing different nitrobenzene precursors. The N-transfer reagents can directly convert a variety of amino compounds into diazo compounds under mild conditions. Particularly, the N-transfer reagents can facilitate the synthesis of the diazo compounds. The application of synthesizing diazo compounds of the present invention can greatly decrease the difficulty in operation, increase the safety during experiments, reduce the cost of production and the environmental pollution, and enhance the industrial value of diazo compounds.
Strecker-type reaction of an aldehyde, ammonium acetate and diethyl phosphite in ethanol afforded the corresponding diethyl α-aminophosphonate, a key building block of the biologically interesting phosphonopeptides, in moderate to good yield.
A mild and highly efficient protocol for the one-pot synthesis of primary α-amino phosphonates under solvent-free conditions
作者:Najmedin Azizi、Fatemeh Rajabi、Mohammad R. Saidi
DOI:10.1016/j.tetlet.2004.10.092
日期:2004.12
Undersolvent-free reaction conditions and in the presence of solid LiClO4 a novel and mild protocol for the one-pot, three-component synthesis of primary α-aminophosphonates from an aldehyde, hexamethyldisilazane and a trialkyl phosphite is described giving high yields and having short reaction times. The same products are obtained in very low yields, when the three-component reaction is carried
Synthesis and antitumor activity of α-aminophosphonates containing thiazole[5,4-b]pyridine moiety
作者:Lijun Gu、Cheng Jin
DOI:10.1039/c2ob25875g
日期:——
A new procedure is developed for the synthesis of α-aminophosphonates containing thiazole[5,4-b]pyridine moiety from conveniently available starting materials. The target compounds were characterized by infrared, 1H NMR, 13C NMR, 31P NMR, mass spectrometry and elemental analysis. The newly synthesized compounds were evaluated for their anticancer activities against PC-3, Bcap-37, H460 cells in vitro
开发了一种新方法,用于从方便获得的起始原料合成含噻唑[5,4- b ]吡啶部分的α-氨基膦酸酯。通过红外,1 H NMR,13 C NMR,31 P NMR,质谱和元素分析对目标化合物进行表征。通过MTT法评价了新合成的化合物在体外对PC-3,Bcap-37,H460细胞的抗癌活性。化合物3b和3f对PC-3,Bcap-37细胞高度有效,对H460细胞有效。有必要进一步研究以发现潜在的抗肿瘤活性。