A convenient synthesis of polyfluoroalkyl-substituted pyrazolo[1,5-a] pyridine, pyrrolo[1,2-b]pyridazine and indolizine derivatives
作者:Xue-chun Zhang、Wei-yuan Huang
DOI:10.1016/s0022-1139(97)00118-8
日期:1998.1
(1b) or N-amino-isoquinolinium iodide (1c), N-phenacylpyridazinium (4), N-phenacylpyridinium (6a–c), and N-phenacylisoquinolinium (6d) bromides in DMF to give poly(per)fluoroalkyl-substituted pyrazolo[1,5-a] pyridine (3), pyrrolo[l,2-a]pyridazine (5) and indolizine (7 and 8) derivatives, respectively.
Reaction of 1-alkylbenzimidazolium 3-ylides with ethyl 2,2-dihydropolyfluoroalkanoates
作者:Xue-chun Zhang、Wei-yuan Huang
DOI:10.1016/s0040-4020(98)00728-5
日期:1998.10
In the presence of base, ethyl 2,2-dihydropolyfluoroalkanoates(2) reacted with N-phenacyl(1a-1b), N-acetonyl(1c), N-ethoxycarbonylmethyl(1d) and N-(diethylaminocarbonyl-methyl) benzimidazole bromides(le) in DMF to give the corresponding pyrrolo[1,2-a]quinoxaline derivatives (3) respectively. When (2) was reacted with N-cyanomethyl benzimidazole bromides (1f-1g), fluoroalkyl substituted I-aryl pyrrole derivatives (4) were formed as the major products. (C) 1998 Elsevier Science Ltd. All rights reserved.
Bloshchitsa, F. A.; Burmakov, A. I.; Kunshenko, B. V., Journal of Organic Chemistry USSR (English Translation), 1986, vol. 22, p. 670 - 675
作者:Bloshchitsa, F. A.、Burmakov, A. I.、Kunshenko, B. V.、Piterskikh, I. A.、Alekseeva, L. A.、Yagupol'skii, L. M.
DOI:——
日期:——
BLOSHCHITSA, F. A.;BURMAKOV, A. I.;KUNSHENKO, B. V.;PITERSKIX, I. A.;ALEK+, ZH. ORGAN. XIMII, 1986, 22, N 4, 750-756
作者:BLOSHCHITSA, F. A.、BURMAKOV, A. I.、KUNSHENKO, B. V.、PITERSKIX, I. A.、ALEK+
DOI:——
日期:——
Semi-Industrial Fluorination of β-Keto Esters with SF4: Safety vs Efficacy
作者:Serhii A. Trofymchuk、Denys V. Kliukovskyi、Sergey V. Semenov、Andrii R. Khairulin、Valerii O. Shevchenko、Maksym Y. Bugera、Karen V. Tarasenko、Dmitriy M. Volochnyuk、Sergey V. Ryabukhin
DOI:10.1055/s-0037-1610744
日期:2020.4
deoxofluorination of β-keto esters using SF4 was investigated. The scope and limitation of the reaction were determined. The efficient method for the synthesis of β,β-difluorocarboxylic acids was elaborated based on the reaction. The set of mentioned acids, being the perspective building blocks for medicinal chemistry, were synthesized on multigram scale. The safety of SF4 use was discussed. The described