Copper(II) sulfate adsorbed on silica gel efficientlydehydrated secondary and tertiary alcohols under mild conditions to give olefins. The rate of dehydration of tertiary alcohols is much faster than that of secondary alcohols.
Macrocycles by Olefination of Dialdehydes with 1,3-Bis(dimethylphosphono)-2-propanone
作者:George Büchi、Hans Wüest
DOI:10.1002/hlca.19790620816
日期:1979.12.12
membered rings have been prepared in a single step by condensation of 1,3-bis (dimethylphosphono)-2-propanone (10) with the dialdehydes 14, 17, 20, and 42 in the presence of hydrogencarbonate in aqueous t-butyl alcohol at reflux without using high dilution techniques. The more highly unsaturated aldehydes give better yields and ketones 34 and 36, or mixtures of the two, were transformed to muscone (1) and
Reaction of Methylidenecycloalkanes with BF3·THF Catalyzed by Cp2TiCl2
作者:L. I. Tulyabaeva、R. R. Salakhutdinov、A. R. Tulyabaev、T. V. Tyumkina、M. F. Abdullin
DOI:10.1134/s1070428022120296
日期:2022.12
Abstract The reaction of methylidenecycloalkanes with BF3·THF in the presence of Cp2TiCl2 as catalyst has been performed for the first time to obtain 1-fluoroboriranes spiro-fused to cycloalkanes and 1-methylcycloalk-1-enes formed as a result of isomerization of the initial olefin. The product structure was confirmed by one- (1H, 13C DEPT, 11B, 19F) and two-dimensional (COSY, HSQC, HMBC) NMR and mass
Cp2TiCl2-Catalyzed Reaction of Methylidenecycloalkanes with BF3·THF
作者:L. I. Tulyabaeva、R. R. Salakhutdinov、A. R. Tulyabaev、T. V. Tyumkina、M. F. Abdullin
DOI:10.1134/s1070428023090063
日期:2023.9
Abstract The Cp2TiCl2-catalyzed reaction of methylidenecycloalkanes with BF3·THF in tetrahydrofuran with the formation of 1-fluoro-1-boraspirocarbocycles and isomerization products of the initial monomer (1-methylcycloalk-1-enes) has been reported for the first time. The product structure was confirmed by one- (1H, 13C DEPT, 11B, 19F) and two-dimensional (COSY, HSQC, HMBC) NMR spectroscopy and mass
作者:G. Yu. Ishmurato、M. P. Yakovlev、R. Ya. Kharisov、O. V. Botsman、O. I. Izibairov、A. G. Mannapov、G. A. Tolstikov
DOI:10.1023/a:1012351524532
日期:——
13-Hvdroxy-2-oxotridecane, which is isolated from extract of Evodia hupehensis Dode honey-bee eggs and actively attracts honey bees, is synthesized via ozonolysis of 1-methylcyclododecene and tetradec-13-en-2-one, the product from monoalkylation of the acetoacetic ester with 1-bromo-10-undecene followed by decarbethoxylation, with further reduction of the intermediate peroxides using NaBH(OAc)(3).