An-Additions to 2,5-dimethoxy-2,5-dihydrofurans, containing electron-accepting substituents in position 3

1982 ◽  
Vol 47 (11) ◽  
pp. 3055-3061 ◽  
Author(s):  
Ivan Stibor ◽  
Jan Šrogl ◽  
Miroslav Janda ◽  
Naděžda Piričová ◽  
Karel Vlažný
Keyword(s):  
Sodium Salt ◽  
Diethyl Malonate ◽  
Addition Product ◽  
Butyl Alcohol ◽  
Reaction Proceeding ◽  
Tert Butyl ◽  
Tert Butyl Alcohol

3-Acetyl-2,5-dimethoxy-2,5-dihydrofuran (V) was alkylated in position 4 with lithium dimethylcuprate and lithium dibutylcuprate. The reaction, proceeding with loss of methanol, afforded 4-acetyl-3-methyl-2-methoxy-2,3-dihydrofuran (X) and 4-acetyl-3-n-butyl-2-methoxy-2,3-dihydrofuran (XI), respectively. Addition of sodium salt of diethyl malonate gave 3-acetyl-4-bis(ethoxycarbonyl)methyl-2,5-dimethoxytetrahydrofuran (XVII) in 69% yield. Addition of methanol, n-butanol and tert-butyl alcohol to methyl 2,5-dimethoxy-2,5-dihydro-3-furoate (VI) in the presence of the corresponding alkoxides afforded the 4-alkoxy derivatives in 95%, 62% and 56% yield, respectively. Reaction of the compound VI with ethyl lithioacetate led to 3-ethoxycarbonylmethyl-4-methoxycarbonyl-2-methoxy-2,3-dihydrofuran (XVI) arising from the addition product by loss of methanol.

Solvolysis of 2-substituted-9-(otrho-substituted phenylmethyl)fluoren-9-yltrimethylammonium ions in various solvents. The effect of steric crowding on alkene formation

1986 ◽  
Vol 64 (6) ◽  
pp. 1060-1071 ◽  
Author(s):  
Peter James Smith ◽  
Jyotsna Pradhan
Keyword(s):  
Rate Constants ◽  
Isotope Effects ◽  
Butyl Alcohol ◽  
Reaction Proceeding ◽  
Tert Butyl ◽  
Tert Butyl Alcohol ◽  
Leaving Group ◽  
Steric Crowding ◽  
Hydrogen Deuterium ◽  
Deuterium Isotope Effects

The solvolytic reaction of several 9-(ortho-substituted phenylmethyl)fluoren-9-yltrimethylammonium salts has been investigated in several different solvents. Substitution and elimination products were found for the reactions in all the solvents studied, with the exceptions that reaction in both tert-butyl alcohol and chloroform led exclusively to the alkene product. The observed rate constants for alkene formation and the percent alkene were measured and it was found that the di-ortho compounds reacted at a faster rate but produced less alkene than the reaction of the corresponding mono-ortho salts. Hydrogen–deuterium isotope effects were also determined for the various reactions. The results are discussed in terms of the reaction proceeding by way of the E1 mechanism, where steric acceleration promotes the loss of the bulky ammonium leaving group to give the carbocation intermediate.

Thermodynamic and Kinetic Investigation of the Solvent Effect on the Oxidation of [Co(en)2SCH2COO]+ with S2O82- In Water-Methanol and Water-tert-Butyl Alcohol Mixtures

1993 ◽  
Vol 58 (5) ◽  
pp. 1001-1006 ◽  
Author(s):  
Oľga Vollárová ◽  
Ján Benko
Keyword(s):  
Transfer Functions ◽  
Activation Parameters ◽  
Butyl Alcohol ◽  
Oxidation Of Co ◽  
Kinetics Of Oxidation ◽  
Tert Butyl ◽  
Tert Butyl Alcohol ◽  
Alcohol Mixtures ◽  
Kinetics Of

The kinetics of oxidation of [Co(en)2SCH2COO]+ with S2O82- was studied in water-methanol and water-tert-butyl alcohol mixtures. Changes in the reaction activation parameters ∆H≠ and ∆S≠ with varying concentration of the co-solvent depend on the kind of the latter, which points to a significant role of salvation effects. The solvation effect on the reaction is discussed based on a comparison of the transfer functions ∆Ht0, ∆St0 and ∆Gt0 for the initial and transition states with the changes in the activation parameters accompanying changes in the CO-solvent concentration. The transfer enthalpies of the reactant were obtained from calorimetric measurements.

scholarly journals Impacts of Sn(II) doping on the Keggin heteropolyacid-catalyzed etherification of glycerol with tert-butyl alcohol

2021 ◽  
pp. 116913
Author(s):  
Márcio José da Silva ◽  
Diego Morais Chaves ◽  
Sukarno Olavo ferreira ◽  
Rene Chagas da Silva ◽  
Jose Balena Gabriel Filho ◽  
...  
Keyword(s):  
Butyl Alcohol ◽  
Tert Butyl ◽  
Tert Butyl Alcohol

Selective synthesis of 2,5-dimethyl-2,4-hexadiene by condensation of iso-butyl aldehyde with tert-butyl alcohol over molecular sieve catalysts

2004 ◽  
Vol 5 (1) ◽  
pp. 41-43 ◽  
Author(s):  
Hua Wang ◽  
Zhongmin Liu ◽  
Chenglin Sun ◽  
Gongwei Wang
Keyword(s):  
Molecular Sieve ◽  
Butyl Alcohol ◽  
Selective Synthesis ◽  
Tert Butyl ◽  
Tert Butyl Alcohol

Solubility of tert-Butyl Hypochlorite in tert-Butyl Alcohol-Water

1954 ◽  
Vol 46 (6) ◽  
pp. 59-59
Author(s):  
J Westwater ◽  
L Audrieth
Keyword(s):  
Butyl Alcohol ◽  
Tert Butyl ◽  
Tert Butyl Alcohol ◽  
Alcohol Water

Selective alkylation of naphthalene with tert-butyl alcohol over HY zeolites modified with acid and alkali

2008 ◽  
Vol 9 (10) ◽  
pp. 1982-1986 ◽  
Author(s):  
Yingli Wang ◽  
Lei Xu ◽  
Zhengxi Yu ◽  
Xinzhi Zhang ◽  
Zhongmin Liu
Keyword(s):  
Butyl Alcohol ◽  
Tert Butyl ◽  
Tert Butyl Alcohol ◽  
Selective Alkylation ◽  
Hy Zeolites

ChemInform Abstract: Alkylation of Diphenylphosphinous Acid (I) with tert-Butyl Alcohol (II) .

ChemInform ◽  
2010 ◽  
Vol 24 (3) ◽  
pp. no-no
Author(s):  
V. A. CHAUZOV ◽  
L. P. KOSTINA
Keyword(s):  
Butyl Alcohol ◽  
Tert Butyl ◽  
Tert Butyl Alcohol
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