- Synthesis and structure of anhydrodimers of salicylaldehydes
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Anhydrodimers have been synthesized by reactions of salicylaldehyde and 3,5-di-tert-butylsalicylaldehyde with SOCl2 or PCl5.A mechanism of condensation has been proposed, and the molecular structure of dibenzo-2,6,9-trioxabicyclonona-3,7-diene has
- Vol'eva, V. B.,Belostotskaya, I. S.,Shishkin, O. V.,Struchkov, Yu. T.,Ershov, V. V.
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- Anionic condensations of 3,5-di-tert-butyl-4(2)-hydroxybenzaldehydes in the presence of weak bases
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Products of the reactions of 4- and 2-hydroxy-3,5-di-tert-butyl- benzaldehydes with malonic acid, diethyl malonate, and acetic anhydride in the presence of weak bases were isolated and identified. The reactions of 3,5-di-tert-butyl-4-hydroxybenzaldehyde w
- Vol'eva,Belostotskaya,Komissarova,Kurkovskaya
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experimental part
p. 803 - 806
(2009/06/28)
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- Urotropin synthesis of 3,5-di-tert-butylsalicylic acid derivatives
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The stability of 3,5-di-tert-butylsalicylic aldehyde against oxidation is due to autoinhibiting of the chain process. However its oxidation into 3,5-di-tert-butylsalicylic acid was performed at the use of acetyl protection of the hydroxy group. In reaction of 6-bromo-2,4-di-tert-butylphenol with urotropin the formation was discovered of 3,5-di-tert-butylsalicylic acid, its nitrile and amide.
- Vol'eva,Belostotskaya,Komissarova,Kurkovskaya,Pleshakova,Prokofeva
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p. 1488 - 1491
(2008/09/16)
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- Discovery of a potent phenolic N1-benzylidene- pyridinecarboxamidrazone selective against Gram-positive bacteria
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As part of a study into antimycobacterial compounds a set of phenolic N1-benzylidene-pyridinecarboxamidrazones was prepared and evaluated. This report describes the unexpected discovery of a potent compound with a pronounced selectivity for Gram-positive bacteria over Gram-negative micro-organisms. In addition, this compound is active against various drug-resistant Gram-positive bacteria.
- Rathbone, Daniel L.,Parker, Katy J.,Coleman, Michael D.,Lambert, Peter A.,Billington, David C.
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p. 879 - 883
(2007/10/03)
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- A mild, chemoselective protocol for the removal of thioketals and thioacetals mediated by Dess-Martin periodinane.
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[reaction: see text] This paper describes the development of a useful procedure for the removal of thioacetals and thioketals using Dess-Martin periodinane (DMP) reagent. In contrast to existing methods, this protocol offers general reactivity, compatibility with a wide range of functional groups, and convenient reaction times. Also discussed are chemoselectivity experiments involving functionalities that may be subject to oxidation by DMP, qualitative effects of substrate on hydrolysis rate, and direct thioacetal to acetal conversions.
- Langille, Neil F,Dakin, Les A,Panek, James S
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p. 575 - 578
(2007/10/03)
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