我们开发了一种使用 AgNO 3作为 NO 源对咪唑并[1, 2- a ] 吡啶衍生物进行选择性自由基亚硝化的新方法。此外,一锅和顺序一锅策略在标准条件下是有效的。这是 AgNO 3首次被报道用作 NO 源。此外,合成转化和克级实验突出了该反应的重要性。该协议的主要特点是毒性低、反应条件温和、官能团耐受性广。
NaNO<sub>2</sub>/I<sub>2</sub>-Mediated Regioselective Synthesis of Nitrosoimidazoheterocycles from Acetophenones by a Domino Process
作者:Sushobhan Mukhopadhyay、Shashikant U. Dighe、Shivalinga Kolle、Praveen K. Shukla、Sanjay Batra
DOI:10.1002/ejoc.201600553
日期:2016.8
regioselective synthesis of nitrosoimidazoheterocycles from the reaction of 2-aminopyridines and acetophenones in the presence of NaNO2 and I2 is described. The reaction is suggested to proceed by a domino process involving sequential imine formation, iodination, iodide displacement by the nitro group, and finally intramolecular cyclization. Reaction of these 3-nitrosoimidazo[1,2-a]pyridines with aldehydes
We have successfully developed a novel and efficient catalyst-free method for the synthesis of 3-nitroso-substituted imidazopyridines, from readily available imidazo[1,2-a]pyridines and tert-butyl nitrite, in good to excellent yields. Importantly, the use of transition-metal catalysts, stoichiometric amounts of acids, and toxic or potentially dangerous oxidants is avoided. This easy and practical method complements nitrosation reactions by expanding the scope and practicality, and should attract much attention in synthetic and pharmaceutical chemistry.
3-Nitroso derivatives of 2-(furyl-2)-indolizine, 2-(furyl-2)-imidazo[1,2-a]pyridine, and its substitution products
作者:N. O. Saldabol、S. A. Giller、L. N. Alekseeva、I. V. Dinan
DOI:10.1007/bf00771315
日期:1972.6
SALDABOL N. O.; LIEPINYSH EH. EH.; POPELIS YU. YU.; GAVAR R. A.; BAUMANE +, ZH. ORGAN. XIMII, 1979, 15, HO 12, 2534-2546
作者:SALDABOL N. O.、 LIEPINYSH EH. EH.、 POPELIS YU. YU.、 GAVAR R. A.、 BAUMANE +