The reactions of π-benzoquinone (BQ) with alkylaluminium compounds of the R3Al (R = Et, i-Bu) and RAlCl2 (R = Me, Et, i-Bu) type have been investigated. It was found that hydroquinone and a respective alkylhydroquinone are formed after hydrolysis, from the reaction of BQ with R3Al; hydroquinone and a respective p-alkoxyphenol are formed from reaction of BQ with RAlCl2 (R = Et, i-Bu). In addition to
On the 1,6-addition of alkylamuninium compounds to para-quinones
作者:Zbigniew florjańczyk、Ewa Szymańska-Zachara
DOI:10.1016/0022-328x(83)87156-3
日期:1983.12
obtained in the reactions of chlorine derivatives of 1,4-benzo-quinone. The results are discussed in terms of a radical mechanism involving a homolytic cleavage of the AlC bond in the donor-acceptor complexformed between the reactants followed by combination of alkyl radicals and aluminium derivatives of semiquinone within a cage. The stable donor-acceptor complexes and aluminium derivative of semiquinone
Process for preparing diprotected 2,3-hydroxymethyl cyclobutanol
申请人:E. R. Squibb & Sons, Inc.
公开号:US05412134A1
公开(公告)日:1995-05-02
The protected cyclobutanone of the formula ##STR1## is treated with a dialkylaluminum chloride, an alkylaluminum dichloride, a trialkylaluminum compound, diphenylsilane in the presence of tris(triphenylphosphine) rhodium (I) chloride, or iridium tetrachloride to yield the corresponding diprotected cyclobutanol. This compound is useful as an intermediate in the preparation of antiviral agents.
The protected cyclobutanone of the formula ##STR1## is treated with a dialkylaluminum chloride, an alkylaluminum dichloride, a trialkylaluminum compound, hydrogen in the presence of the catalysts ruthenium black or ruthenium on alumina, diphenyl-silane in the presence of tris(triphenylphosphine) rhodium (I) chloride, or iridium tetrachloride to yield the corresponding diprotected cyclobutanol. This compound is useful as an intermediate in the preparation of antiviral agents.
Bidentate and tridentate coordination modes of bis(3-methylindolyl)-2-(1-methylimidazolyl)methane in complexes of aluminum and gallium
作者:Anirban Das、Nicholas B. Kingsley、Kristin Kirschbaum、Mark R. Mason
DOI:10.1016/j.jorganchem.2022.122554
日期:2023.1
-(1-methylimidazolyl)methane (1) was synthesized by acid-catalyzed condensation of methyl-2-formylimidazole and two equivalents of 3-methylindole, followed by deprotonation of the imidazole moiety of the protonated compound, [(1-CH3C3H2N2H)HC(3-CH3C8H4NH)2][HSO4] ([1•H][HSO4 ]). Reactions of a trialkylaluminum or tri‑tert-butylgallium with 1 produced complexes (1-CH3C3H2N2)HC(3-CH3C8H4N)(3-CH3C8H4NH)MR2
Bis(3-methylindolyl)-2-(1-methylimidazolyl)methane ( 1 ) 是通过酸催化缩合甲基-2-甲酰基咪唑和两当量的 3-甲基吲哚,然后将质子化化合物的咪唑部分去质子化合成的, [(1-CH 3 C 3 H 2 N 2 H)HC(3-CH 3 C 8 H 4 NH) 2 ][HSO 4 ] ([ 1 •H][HSO 4 ])。三烷基铝或三叔丁基镓与1反应生成络合物 (1-CH 3 C 3 H 2 N2 )HC(3-CH 3 C 8 H 4 N)(3-CH 3 C 8 H 4 NH)MR 2 ( M = Al, R = Me ( 2a ), Et ( 2b ), i Bu ( 2c ), t Bu ( 2d ); M = Ga, R = t Bu ( 3 )) 其中单去质子化的1采用双齿配位方式。2a - 2d或3的热解在回流甲苯中不会导致进一步的烷烃消除。用两当量的n