38253-20-2Relevant academic research and scientific papers
Dynamic kinetic resolution allows a highly enantioselective synthesis of cis-α-aminocycloalkanols by ruthenium-catalyzed asymmetric hydrogenation
Liu, Sheng,Xie, Jian-Hua,Wang, Li-Xin,Zhou, Qi-Lin
, p. 7506 - 7508 (2008/09/17)
(Chemical Equation Presented) Resolutely dynamic hydrogenation: A highly efficient asymmetric hydrogenation of racemic N,N-disubstituted α-aminocycloalkanones involving dynamic kinetic resolution in the presence of a ruthenium catalyst gives chiral α-aminocycloalkanols with excellent enantioselectivities and cis diastereoselectivities (see scheme). A synthesis of optically pure U-(-)-50488 based on this reaction is reported.
Light-induced Reactions of 2-(N-Alkyl-N-arylamino)cyclohexanones and Related Amino-cycloalkanones: Formation of 7-Azabicyclooctan-1-ols
El-Hamamy, Ahmad A.,Hill, John,Townend, John
, p. 573 - 580 (2007/10/02)
On irradiation, 2-(N-alkyl-N-arylamino)cyclohexanones (aryl = Ph; alkyl = Me, benzyl, allyl, Et, CH2CH2Ph, or CH2CF3; or aryl = p-tolyl; alkyl = Me) (10) or (20), 4,4-dimethyl-2-(N-methylanilino)-cyclohexanone (24), and 2-(N-methylanilino)-5α-cholestan-3-one (26) underwent type-II cyclisation to afford azetidinol (7-azabicyclooctan-1-ol) derivatives.In general, fission to give the corresponding N-alkyl-N-arylamine and ketone was a minor photoreaction.When the alkyl group of the 2-(N-alkylanilino)cyclohexanone had the structure -CH(R)CH2R', a double 1,5-hydrogen transfer occurred leading to a low yield of a 2-anilinocyclohexanol (31a).Photolysis of 2-anilinocyclohexanone (32a) gave a little of the direct-fission product aniline (17a), and the alkylamino-ketones 2-(NN-diethylamino)- (32b) and 2-(N-pyrrolidino)-cyclohexanone (32c) underwent no significant photoreaction in methanol.The isolation of indan-1-one and N-trideuteriomethylaniline on irradiation of 2-(N-trideuteriomethylanilino)-indan-1-one (33b) in diethyl ether indicated that the photoreaction was a direct Cα-N bond fission and not a type-II fission.
