1559-02-0Relevant articles and documents
A convenient synthesis of cyclopropane malonyl peroxide
Terent'Ev, Alexander O.,Vil', Vera A.,Mulina, Olga M.,Pivnitsky, Kazimir K.,Nikishin, Gennady I.
, p. 345 - 345 (2014)
Cyclopropane-1,1-dicarbonyl peroxide was prepared in 85% yield by the reaction of diethyl cyclopropane-1,1-dicarboxylate with the urea hydrogen peroxide clathrate in the presence of methanesulfonic acid.
Polymers Containing Ring-Strain Energy. 1. New Monomers and Polymers Based on Cyclopropane, Norbornadiene, and Quadricyclane
Wright, Michael E.,Allred, Gary D.,Wardle, Robert B.,Cannizzo, Louis F.
, p. 4122 - 4126 (1993)
The synthesis and polymerization chemistry of 1,1-bis(XCH2)cyclopropane was studied.Treatment of 1 with base in the presence of α,ω-dihalides did not produce a polyether.However, treatment of 4 with the bis(alkoxide) derived from hexanediol afforded a polyether of low molecular weight n=3000, PD=3>.A general method for alkylating norbornadiene in the 2-position was developed.Treatment of norbornadiene with tert-BuOK, tetramethylethylenediamine (TMEDA), n-BuLi, and tributylchlorostannane (in that order) afforded 2-(tributylstannyl)norbornadiene in excellent yield.On the other hand, carbon electrophiles required the generation of the 2-(lithiocyanocuprate) in order to effect clean alkylation.Treatment of 2-norbornadiene (8a) with RMgX in the presence of (dppp)NiCl2 afforded the cross-coupling products 2-(XCH2)-norbornadiene in high yield.Polymerization of 9 in THF initiated by n-BuLi resulted in an elastomeric polymer (12) n=18,000, PD=1.5>.Photolysis of 12 in the presence of (Ph3P)2CuBr converted the pendant norbornadiene to quadricyclane (13).Heating of the photoisomerized sample to 180 deg C caused an exothermic (by DSC) reaction which corresponded to 59percent of theory (using the value 26 kcal/mol: quadricyclane -> norbornadiene).
1, 1-cyclopropane dicarboxylic acid amide compound as well as preparation method and application thereof
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Paragraph 0024; 0028-0030, (2021/01/11)
The invention discloses a 1, 1-cyclopropane dicarboxylic acid amide compound as well as a preparation method and application thereof, and the structural formula of the 1, 1-cyclopropane dicarboxylic acid amide compound is as shown in a formula (I): in the formula (I), the structures of two substituted benzene rings are the same, the number of substituents R on each substituted benzene ring is 1-3,and the substituent R is selected from H, halogen, C1-C4 alkyl, C2-C4 ester group or C1-C3 alkoxy. The 1, 1-cyclopropane dicarboxylic acid amide compound provided by the invention is a novel compoundwith an efficient weeding effect, and provides a basis for research and development of novel herbicides.
Efficient cyclopropanation of aryl/heteroaryl acetates and acetonitriles with vinyl diphenyl sulfonium triflate
Zhou, Mingwei,Hu, Yimin,En, Ke,Tan, Xuefei,Shen, Hong C.,Qian, Xuhong
supporting information, p. 1443 - 1445 (2018/03/12)
A convenient method was developed for the cyclopropanation of aryl acetates and aryl acetonitrile using vinyl diphenyl sulfonium triflate salt. The newly developed conditions are simple, mild, and compatible with a wide range of functional groups, without the need to apply an inert atmosphere, or alkali bases.
Preparation method of compound
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Paragraph 0039; 0040; 0041; 0042; 0043; 0044; 0045-0059, (2017/06/27)
The invention discloses a preparation method of a compound shown in the formula (I). The method is characterized by including the following steps of firstly, mixing the compound shown in the formula (I), a compound shown in the formula (III), strong alkali and weak acid salt and a catalyst to obtain a mixed solution; secondly, conducting heating and refluxing on the mixed solution obtained in the first step, and conducting post-processing to obtain the compound shown in the formula (I), wherein X is Cl, Br or I. The method can effectively improve the yield and safety of the compound shown in the formula (I). Please see the formula in the description.