butyllithium reaction

Found inside – Page 74REACTION OF 2 - NITROPENTACHLORO - 1 , 3 - BUTADIENE WITH METHYL - AND BUTYLLITHIUM UDC 547 . 332 + 547 . 413 V . I . Potkin , v . A . Knizhnikov , R . V . Kaberdin , and Yu . A . 01 ' dekop 1 , 1 , 2 - Trichloro - 3 - nitro - 4 - methyl ... Found inside – Page 6... 29 who isolated 7 after quenching the reaction of a basic organolithium in ... THF for extended reactions of t - Buli or for reactions conducted above 0 ... Found inside – Page 1221... using butyllithium 746 fi Pyran-3-carboxylates, 4-oxotetrahydro-, chiral, from diastereoselective reaction of 1,3-dioxin-4-ones with aldehydes, ... Found inside – Page 320At —60°C and below. compound 111 is readily lnetallated by reaction with a second molecule of butyllithium with the formation of the dilithio-substituted ... Found inside – Page 43Buli 2. H2O ÓM boutin OH À 47 3 48 49 SCHEME 26 . The reaction of 47 with organomagnesium compounds proceeds in a similar manner . The ratio of reaction ... Found inside – Page 8However tetrahydrofuran should not be used to eliminate the slow initiation reaction in the A-B-A block polymerization since even trace quantities ([THF0 i [n-BuLi]0) of this ether will cause a drastic decrease in the cis-1,4 content of the ... Found inside – Page 16It was evident that the metallation reaction between the n - butyllithium and thiophene was not occurring to any appreciable extent . Two methods were developed to force the reaction to completion . The thiophene - ether solution was added to ... Found inside – Page 963.3.9 Li-Barbier Reactions with n-Butyllithium A quite different version of the Li-Barbier reaction, which was recently published [38], has already been ... Found inside – Page 742The mixture was warmed to room temperature and allowed to react for 1.5 h leaving a bright red - orange , fluorescent ... At -75 ° C , 4.4 mL of n - butyllithium was added , and after 15 min , the reaction was warmed to 0 ° C and allowed to react ... Found inside – Page 50n + Ph-S-Ph (17), 8% 38% Reaction of the triarylsulfonium salts with vinyllithium or ... With saturated alkyllithium derivatives such as n-butyllithium or ... Found inside – Page 463Examples of synthetic application of these reactions will be discussed in Chapter 7 ... to follow the reaction of benzaldehyde with n-butyllithium at À85 C, ... Found inside – Page 482... is destroyed by reaction with a second mole of tert - butyllithium : 30,31 ... 6 Li Li 2 t - Buli 2 t - BuLi THF / pentane -78 ° C Li t - Buli t - Bu Li ... Found inside – Page 236Scheme 82 Lithiation of Furans and Reaction with Electrophiles[425,426,444±450] Li Li BuLi BuLi O Li O 238 E O 239 E E O O + E+ + 2E+ 1 3 4 O 2 CHO O 240 ... Found inside – Page 461After several minutes , H2 evolution ceased and Introduction the reaction was stirred for 24 hours . ... and iodine ( Fisher ) , all The fact that the 1,4 - bis ( dimethylhydrosilyl ) -2,3,5,6 - tetramethylbenzene silanes ( Gelest , Inc. ) , n - butyl lithium ... Found inside – Page 4Secondly, a solution of butyllithium in Et2O can be obtained by controlled addition of n-butyl chloride to lithium chips in Et2O [18]. The reaction proceeds ... Found inside – Page 82Accordingly , if the reaction is run in D20 , then deuterium would be ... H Buli CE ( 2.53 ) The isotopic labelling studies alone may sometimes not be ... Found inside – Page 25The n - butyllithium reaction was used to examine a ( CF. ) , cathode for signs of swelling under non - electrochemical reduction conditions in which the solvent was non - polar and incapable of coordinating Li * . Both chemical reactions were ... Found inside – Page 181For example , ethyllithium and n - butyllithium have half - lives in diethyl ... a cycloeliminative degradation reaction upon reaction with butyllithium at ... Found inside – Page 755Alcohols react as acids in the presence of an organolithium reagent. ... 15.21 Draw out the reaction of butyllithium and ethanol and show all products. Found inside – Page 185However, these reactions appear to be somewhat anomalous as trimethylene oxide reacts ... The sequential reaction of 1-methylpyrrole with butyllithium and ... Found inside – Page 158510 - Buli J - HBr , - ( la ) V Bu Quantum - chemical Treatment of Cyclization and Recyclization Reactions : ... 0 BuLi - ( la ) Bu Buli - ( la ) potassium tert - butylate turned out to be less nucleophilic with respect to sulfoxide IVb than butyllithium . Found inside – Page 427This can only mean that the complexes containing butyl lithium participate in the propagation reaction with a reduced propagation constant compared to the ... Found inside – Page 204With the addition of the first few drops of n-butyllithium the reaction mixture turns from clear and colorless to clear and light pink, and darkens as ... Found inside – Page 116Effect of Reaction Temperature The effect of temperature has been studied for a hydrogenation reaction using the cobaltocene / n - butyllithium catalyst system . The H , was maintained at 25 kg / cm2 and the n - butyllithium to cobaltocene ... Found inside – Page 10The former is thought to proceed via a single-electrontransfer mechanism followed by rate-limiting addition, whereas the n-butyllithium reaction occurs with ... Found inside – Page 1178The formation of 5- ( trimethylsilyl ) -2 - furaldehyde diethyl acetal is the main process in the synthesis both with butyllithium in hexane ( 1 ) , and also with butyllithium in ether . The performance of the reaction under analogous conditions with ... Found inside – Page 130When iodoalkanes react with n - butyllithium in a hydrocarbon solvent , a rapid exchange of the butyl and alkyl groups accompanies the formation of several reaction products . Proton magnetic resonance observations on rapidly reacting ... Found inside – Page 388The Trityl Carbanion The triphenylmethyl carbanion , the trityl anion , can be generated by the reaction of triphenylmethane with the very powerful base , n - butyllithium . The reaction generates the blood - red lithium triphenylmethide and ... Using examples from the literature of asymmetric synthesis (more than 1300 references), the aim of this book is to present a detailed analysis of the factors that govern stereoselectivity in organic reactions. Found inside – Page 2025PhSCH CH SPh + BuLi PhSC6H12 + Phs XV XVI SYNTHESIS AND LACTONIZATION OF DIPHENYLACETYLENE - 2,2 ... A study was made of the reaction of vinyl sulfides with organometalics . n - Butyllithium and ethyllithium have been ... Found inside – Page 828Reaction of acyclic (r|3-allyl)Fe(CO)3 anion intermediates with dioxygen produced allylic alcohols after acid is quenching. ... under dinitrogen at -78 °C, was added rapidly via syringe a solution of n-butyl- lithium (1 .50 M in hexane, 1 .35 mmol, ... Found inside – Page 129of the reacting base that is formed after the deprotonation of the initial ... If butyllithium is used as a base , then very unreactive hydrogens may be ... Found inside – Page 152Carbonation of the butyllithium reaction mixture at -— 78° gave o-chlorobenzoic acid, suggesting the intermediate formation of o-chlorophenyllithium.95 ... Found inside – Page 342Ortho-directed lithiation reactions have continued to attract attention.” The ortho metallation of anisole with n-BuLi in toluene-d; has been investigated ... Found inside – Page 213Any residual t-BuLi remaining in solution may be easily removed prior to reaction of the primary alkyllithium by taking advantage of the differential ... In a recent investigation, the novel ambident allylic lithium reagent gem-chloro(trimethylsilyl)allyllithium, was prepared and its reactions with a variety of substrates was studied. (Author).

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