Intramolecular Arylation Reactions of Alkenes: A Flexible Approach to Chromans and Tetrahydroquinoline Derivatives
作者:José Barluenga、Mónica Trincado、Eduardo Rubio、José M. González
DOI:10.1021/ja0397299
日期:2004.3.1
A metal-free approach to chroman derivatives by the reaction of different allylphenyl ethers with Ipy2BF4 is described. The access to this frame, by direct cyclization of the starting materials, takes place smoothly. In addition, an unusual and selective sequence that comprises initial rearrangement and further cyclization could be accomplished, with temperature as an excellent element of control.
Asymmetric aminoarylation for the synthesis of trans-3-amino-4-aryltetrahydroquinolines: An access to aza-analogue of dihydrexidine
作者:Sk Md Samim Akhtar、Sukanta Bar、Saumen Hajra
DOI:10.1016/j.tet.2021.132257
日期:2022.1
A proficient stereoselective aminoarylation reaction of N-cinnamylanilines, based on a two-step protocol of catalytic enantioselective aziridination and subsequent 6-endo-tet Friedel-Crafts cyclization, has been developed and demonstrated. A pair of chiral bis-oxazoline ligand and Cu(OTf)2 offered an effective combination in the synthesis of trans-3-amino-4-aryltetrahydroquinolines with excellent diastereo-
A Convenient and Efficient Route for the Allylation of Aromatic Amines and α-Aryl Aldehydes with Alkynes in the Presence of a Pd(0)/PhCOOH Combined Catalyst System
作者:Nitin T. Patil、Huanyou Wu、Isao Kadota、Yoshinori Yamamoto
DOI:10.1021/jo0485684
日期:2004.12.1
The allylation of aromatic amines with alkynes proceeded smoothly in the presence of catalytic amounts of Pd(PPh3)(4) and benzoic acid. The allylation products were obtained in high yields in a regio- and stereoselective manner. The effect of various groups on the nitrogen atom of anilines was studied. Regardless of the substituent (electron withdrawing or electron donating) on the aromatic ring, the reaction proceeded well. Various functionalities, including -CH3, -OMe, -Cl, -CN, -COOMe, -NO2 and -COCH3 were tolerated under the reaction conditions. Similarly, the allylation of alpha-aryl aldehydes proceeded well with the same level of regio- and stereoselectivity as the allylation of aromatic amines. This reaction provides the second example of the transition metal catalyzed direct alpha-allylation of aldehydes.