4973-24-4Relevant articles and documents
Preparation method of 2,6-ditertbutyl p-alkylphenol
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Paragraph 0041; 0043, (2018/07/30)
The invention discloses a preparation method of 2,6-ditertbutyl p-alkylphenol. The preparation method comprises the following steps of: 1) adding aqueous or alcohol solution of aldehyde and dimethylamine and alcohol solution of 2,6-ditertbutylphenol into a reaction kettle, and reacting to obtain 2,6-ditertbutyl-4-(dimethylaminoalkyl)phenol, wherein the aldehyde is fatty aldehyde with 1-5 carbon atoms; 2) carrying out catalytic hydrogenolysis on 2,6-ditertbutyl-4-(dimethylaminoalkyl)phenol prepared by the step 1) in the reaction kettle to obtain 2,6-ditertbutyl p-alkylphenol. The preparation method disclosed by the invention has the advantages that the raw materials are low in cost and easy in obtaining, no corrosive waste water is caused, the reaction yield is high and the purity and the yield of a product can be up to 98% or more.
Radical ion probes, 8. Direct and indirect electrochemistry of 5,7-di-tert-butylspiro[2.5]octa-4,7-dien-6-one and derivatives
Phillips, J. Paige,Gillmore, Jason G.,Schwartz, Phillip,Brammer Jr., Larry E.,Berger, Daniel J.,Tanko
, p. 195 - 202 (2007/10/03)
Results pertaining to the direct and indirect electrochemistry of 5,7-di-tert-butylspiro[2.5]octa-4,7-dien-6-one (1a), 1-methyl-5,7-di-tert-butylspiro[2.5]octa-4,7-dien-6-one (1b), and 1,1,-dimethyl-5,7-di-tert-butylspiro[2.5]octa-4,7-dien-6-one (1c) are reported. Product analyses reveal that reduction of all these substrates leads to cyclopropane ring-opened products; ring opening occurs with modest selectivity leading to the more substituted (stable) distonic radical anion. The direct electrochemistry of these compounds is characterized by rate limiting electron transfer (with α ~ 0.5), suggesting that while ring opening is extremely rapid, the radical anions do have a discrete lifetime (i.e., electron transfer and ring opening are not concerted). Utilizing homogeneous redox catalysis, rate constants for electron transfer between 1a, 1b, and 1c and a series of aromatic radical anions were measured; reduction potentials and reorganization energies were derived from these rate constants by using Marcus theory.