Trimethysilyl triflate in organic synthesis11Part 11 of this series. Part 10: S. Murata and R. Noyori, Tetrahedron Letters 2107 (1981).
作者:R. Noyori、S. Murata、M. Suzuki
DOI:10.1016/s0040-4020(01)93263-6
日期:——
Trimethylsilyl triflate is a powerful silylating agent for organic compounds and acts as a catalyst which accelerates a variety of nucleophilic reactions in aprotic media. The reactions proceed via one-center, electrophilic coordination of the silyl group to hetero functional groups and exhibit unique selectivities.
Photochemical Acetalization of Carbonyl Compounds in Protic Media Using an in Situ Generated Photocatalyst
作者:H. J. Peter de Lijser、Natalie Ann Rangel
DOI:10.1021/jo0485886
日期:2004.11.1
Carbonylcompounds are conveniently converted into their corresponding dimethyl acetals in good yields and short reaction times by means of a photochemical reaction in methanol with a catalytic amount of chloranil (2,3,5,6-tetrachloro-1,4-benzoquinone, CA) as the sensitizer. Using aldehydes gives better results than using ketones, which also tend to form enol ethers as side products. These results
Acid-base reactions of 1,3,4-thiadiazolines and thiocarbonyl ylides; 1,3,4-thiadiazoline-2-spiro-2′-adamantane
作者:Grzegorz Mloston、Rolf Huisgen
DOI:10.1016/s0040-4039(00)98510-1
日期:1985.1
with its acidic precursor , in the course of which the anion undergoes electrocyclic ring opening; the acid and base functions offer the clue to a prolific chemistry of the thiadiazoline and the thiocarbonylylide .
在45℃下由标题化合物1惊人地形成C 22 H 32 N 2 S 2,涉及碱性金刚烷硫酮S-甲基化物()与其酸性前体的相互作用,在此过程中,阴离子经历了电环开环;酸和碱的功能为噻唑啉和硫代羰基内酰胺的高产化学提供了线索。
Acid–base reactions of adamantanethione S -methylide and its spiro-1,3,4-thiadiazoline precursor
作者:Grzegorz Mloston、Rolf Huisgen
DOI:10.1016/s0040-4020(00)00988-1
日期:2001.1
The spiro-1,3,4-thiadiazoline 1 loses N2 at 45°C, and, as recently reported, the short-lived adamantanethione S-methylide (2) is an active 1,3-dipole. Interception of 2 by acids HX consists of CH2-protonation and ion recombination. Even 1 acts as HX vs 2 and—after electrocyclic ring opening of the anion (13 →15)—affords the dithioacetal C22H32N2S2 (14). The Δ3-thiadiazoline 1 is converted by base or
螺-1,3,4-噻二唑啉1在45°C时失去N 2,并且,最近报道,寿命短的金刚烷硫酮S-甲基化物(2)是活性的1,3-偶极子。酸HX对2的拦截由CH 2-质子化和离子重组组成。偶数1代表HX vs 2,并且在阴离子(13 → 15)经电环开环后,承担了二硫缩醛C 22 H 32 N 2 S 2(14)的作用。的Δ 3 -thiadiazoline 1通过碱或酸催化转化为Δ 2 -tautomer 21。氨基腙(25,26)从形成1点秒-胺。讨论了机理并阐明了结构。
A new method for the synthesis of bishydroperoxides based on a reaction of ketals with hydrogen peroxide catalyzed by boron trifluoride complexes
作者:Alexander O. Terent'ev、Alexander V. Kutkin、Maxim M. Platonov、Yuri N. Ogibin、Gennady I. Nikishin
DOI:10.1016/s0040-4039(03)01844-6
日期:2003.9
A reaction of cycloalkanone, alkanone and alkyl aryl ketone ketals with H2O2 catalyzed by borontrifluorideetherate and boron trifluoride–methanol complexes was studied. A new versatile method for the synthesis of bishydroperoxides and their derivatives, viz. 1,1′-dihydroperoxyperoxides and 1,2,4,5-tetraoxacyclohexanes, was developed based on this reaction.
研究了三氟化硼醚化物和三氟化硼-甲醇配合物催化的环烷酮,烷酮和烷基芳基酮缩酮与H 2 O 2的反应。一种新的通用的双氢过氧化物及其衍生物的合成方法,即。基于该反应,开发了1,1'-二氢过氧过氧化物和1,2,4,5-四氧杂环己烷。