- PREPARATIVE METHOD FOR THE SYNTHESIS OF 2,2-DICHLORO-1-FORMYLCYCLOPROPANE AND REACTIONS BASED ON IT
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2,2-Dichloro-1-formylcyclopropane was obtained by the oxidation of (gem-dichlorocyclopropyl)methanol with pyridinium chloro- or fluorochromate.Suitable methods for the synthesis of gem-dichlorocyclopropyl-containing alcohols and ketones were developed on the basis of the product.It was shown that the proposed methods for the synthesis of cyclopropane derivatives can be used in the Julia-Johnson reaction.
- Khusid, A. Kh.
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p. 1075 - 1079
(2007/10/02)
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- CONVENIENT METHOD FOR THE PRODUCTION OF 2,2-DICHLOROCYCLOPROPYL ALKYL AND ARYL KETONES
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2,2-Dichlorocyclopropyl alkyl and aryl ketones were obtained with good yields by the reaction of 2,2-dichloro-1-cyclopropanecarbonyl chloride with Grignard reagents or with aromatic hydrocarbons under Friedel-Crafts conditions.
- Kulinkovich, O.G.,Tishchenko, I.G.,Masalov, N.V.
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p. 859 - 862
(2007/10/02)
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- A different direction of opening of the cyclopropane ring in 1-acetyl-2,2-dichlorocyclopropane and 1-acetyl-2,2-dichloro(dibromo)-3,3-dimethylcyclopropane by the action of sodium alcoholates
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1-Acetyl-2,2-dichlorocyclopropane, 1-acetyl-2,2-dichloro-3,3-dimethyl-cyclopropane, and 1-acetyl-2,2-dibromo-3,3-dimethylcyclopropane react smoothly with an excess of sodium methoxide and ethoxide with cleavage of the C1-C2 bond of the cyclopropane ring and the formation of the corresponding dihydrofurans.The direction of reaction changes in the reaction of 1-acetyl-2,2-dichloro-3,3-dimethylcyclopropane with an eqiumolar amount of sodium ethoxide and of 1-acetyl-2,2-dibromo-3,3-dimethylcyclopropane with an equimolar amount of sodium ethoxide or methoxide.In this case cleavage occurs at the C1-C3 bond of the cyclopropane ring, and the corresponding alkoxy-substituted acetylenic ketone is formed as the main product.
- Tishchenko, I. D.,Kulinkovich, O. G.,Masalov, N. V.
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p. 1039 - 1042
(2007/10/02)
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