5186-09-4Relevant academic research and scientific papers
Organocatalytic Cloke-Wilson Rearrangement: DABCO-Catalyzed Ring Expansion of Cyclopropyl Ketones to 2,3-Dihydrofurans
Zhang, Jingfang,Tang, Yuhai,Wei, Wen,Wu, Yong,Li, Yang,Zhang, Junjie,Zheng, Yuansuo,Xu, Silong
supporting information, p. 3043 - 3046 (2017/06/23)
An organocatalytic Cloke-Wilson rearrangement of cyclopropyl ketones to 2,3-dihydrofurans is exploited utilizing the homoconjugate addition process. With 1,4-diazabicyclo[2.2.2]octane as the catalyst, the rearrangement in DMSO at 120 °C proceeded in gener
Synthesis and characterization of bis-cyclopropanated 1,3,5-tricarbonyl compounds. A combined synthetic, spectroscopic and theoretical study
Rahn, Thomas,Bendrath, Franziska,Hein, Martin,Baumann, Wolfgang,Jiao, Haijun,Boerner, Armin,Villinger, Alexander,Langer, Peter
experimental part, p. 5172 - 5184 (2011/08/22)
Bis-cyclopropanated 1,3,5-tricarbonyl compounds were prepared by a sequence of Claisen condensations and cyclopropanations. The optimization of the conditions proved to be very important to suppress retro-Claisen reactions. The conformation of these molec
Synthesis and structural characterization of (CH2)n-bridged indenyl-pyrazoles and their cyclopentadienyl nickel(II) complexes
Tan, Weiqiang,Yu, Zhengkun,Liu, Bing,Wu, Kaikai,Liu, Zishuang,Chen, Jinzhu
scheme or table, p. 199 - 206 (2009/04/13)
A new class of (CH2)n-bridged indenyl-pyrazoles [4-{Ind-(CH2)n}-RR′PzH] (Ind = 1H-inden-3-yl, n = 1-3, RR′Pz = 3,5-disubstituted pyrazolato) were synthesized. Reactions of the indenyl-functionalized pyrazoles wi
Preparation and Cleavage of Some Cyclopropane Derivatives
Podder, Ranjan Kumar,Sarkar, Ranjit Kumar,Ray, Suvas C.
, p. 530 - 536 (2007/10/02)
Alkylation of active methylene compounds with 1,2-dibromoethane using anhyd.K2CO3/DMF at room temperature gives cyclopropane derivatives which undergo selective transformation by simple methods.Cyclopropanes, obtained by the condensation of α-diazoacetophenones with olefins, are cleaved to trisubstituted olefins with Grignard reagent.Hydration of the products has also been studied.
OPENING OF THE THREE-MEMBERED RING IN 1,1-DISUBSTITUTED CYCLOPROPANES AS A METHOD FOR THE SYNTHESIS OF FUNCTIONAL DERIVATIVES OF PYRAZOLE AND ISOXAZOLE
Zefirov, N. S.,Kozhushkov, S. I.,Kuznetsova, T. S.
, p. 644 - 650 (2007/10/02)
The reaction of 1,1-diacylcyclopropanes with hydrazine and hydroxylamine derivatives, which leads to nucleophilic opening of the three-membered ring and the formation of pyrazole and isoxazole derivatives, was studied.The dependence of the occurrence of t
CYCLOALKYLATION BY THE α,ω-DIBROMIDES OF COMPOUNDS CONTAINING AN ACTIVATED METHYLENE GROUP AS A METHOD FOR THE SYNTHESIS OF 1,1-DISUBSTITUTED CYCLOALKENES
Zefirov, N. S.,Kuznetsova, T. S.,Kozhushkov, S. I.,Surmina, L. S.,Rashchupkina, Z. A.
, p. 474 - 480 (2007/10/02)
A convenient preparative method was developed for the cycloalkylation of active methylene compounds, including β-diketones, by the dibromides BrCH2(CH2)nCH2Br (n = 0,1,2) in the presence of an excess of potassium carbonate in DMSO.The reaction gives high yields for the dibromides with n = 0 and 2, whereas the formation of cyclobutanes (n=1) is complicated by O,C-alkylation.The 1-substituted 1-acylcyclopropanes undergo thermal isomerization to the corresponding dihydrofuranes.
