154492-64-5Relevant academic research and scientific papers
Large-steric hindrance chiral quaternary ammonium salt phase transfer catalyst derived from cinchona alkaloid and synthesis method thereof
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Paragraph 0054-0058, (2021/10/27)
The invention discloses a large-steric hindrance chiral quaternary ammonium salt phase transfer catalyst derived from cinchona alkaloid. The invention belongs to the technical field of asymmetric catalysis. In the invention, the cinchona alkaloid is disso
Enantioselective copper-catalyzed 1,4-addition of dialkylzincs to enones followed by trapping with allyl iodide derivatives
Kawamura, Kenjiro,Fukuzawa, Hitomi,Hayashi, Masahiko
supporting information; experimental part, p. 640 - 647 (2011/08/06)
Enantioselective copper-catalyzed 1,4-addition of dialkylzincs to enones proceeded in the presence of 0.1 mol% of Cu(OTf)2 and 0.25 mol% of an N,N,P-ligand containing a quinoline moiety to afford the corresponding conjugated adducts in 99%ee. The intermediate zinc enolates were trapped with substituted allyl iodides to give disubstituted ketones with high diastereoselectivity and enantioselectivity.
Synthesis of 2,2c-6-trisubstituted and 2,2c-,6,6--tetrasubstituted diaryl sulfides and diaryl sulfones by copper-promoted coupling and/or ortholithiation
Clayden, Jonathan,Senior, James
scheme or table, p. 2769 - 2772 (2010/02/28)
Stoichiometric copper(I) iodide, in the presence of potassium carbonate and ethylene glycol, promotes the coupling of even highly sterically encumbered 2,6-disubstituted thiophenols and aryl iodides to form hindered diarylsulfides. Hindered diarylsulfones
Phenylthiyl radical complexes of gallium(III), iron(III), and cobalt(III) and comparison with their phenoxyl analogues
Kimura,Bill,Bothe,Weyhermueller,Wieghardt
, p. 6025 - 6039 (2007/10/03)
Three hexadentate, asymmetric pendent arm macrocycles containing a 1,4,7-triazacyclononane-1,4-diacetate backbone and a third, N-bound phenolate or thiophenolate arm have been synthesized. In [L1]3- the third arm is 3,5-di-tert-butyl
Utilization of 2,4-Di-t-butyl-6-(methoxymethyl)phenyl as a New Sterically Protecting Group
Yoshifuji, Masaaki,Kamijo, Kazunori,Toyota, Kozo
, p. 3440 - 3443 (2007/10/02)
A sterically hindered bromobenzene, 2-bromo-1,5-di-t-butyl-3-(methoxymethyl)benzene, was prepared and converted to the corresponding phosphonous dichloride.The dichloride was then utilized to stabilize a low-coordinate phosphorus compound such as 1-2,4-di-t-butyl-6-(methoxymethyl)phenyl-2-(2,4,6-tri-t-butylphenyl)diphosphene.Furthermore, the dichloride gave a cyclization product 1-chloro-2,1-oxophosphaindan with elimination of chloromethane on standing at room temperature.
