Rhodium(I)-Catalyzed Nucleophilic Ring-Opening Reactions of Oxabicyclo Adducts Derived from the [4 + 2]-Cycloaddition of 2-Imido-Substituted Furans
作者:Albert Padwa、Qiu Wang
DOI:10.1021/jo060238r
日期:2006.4.1
the alkenyl π-bond followed by a nitrogen-assisted cleavage of the carbon−oxygen bond occurs to furnish a π-allyl rhodium(III) species. Addition of the nucleophile then occurs from the least hindered terminus of the resulting π-allyl rhodium(III) complex. Proton exchange followed by rhodium(I) decomplexation ultimately leads to the cis-diastereomer.
A Cycloaddition Approach toward the Synthesis of Substituted Indolines and Tetrahydroquinolines
作者:Albert Padwa、Michael A. Brodney、Bing Liu、Kyosuke Satake、Tianhua Wu
DOI:10.1021/jo982453g
日期:1999.5.1
acyl azide by a Curtius rearrangement in the presence of an alcohol. Alkylation of the resulting N-alkyl carbamate with an alkenyl bromide allows for the synthesis of a wide variety of cycloaddition precursors. The scope of the IMDAF reaction was evaluated by using mono- and disubstituted alkenes, electron rich and electron deficient olefins, and acetylenic tethers. Cyclic 2-amidofurans were also synthesized
Indole synthesis by palladium-catalyzed tandem allylic isomerization – furan Diels–Alder reaction
作者:Jie Xu、Peter Wipf
DOI:10.1039/c7ob01654a
日期:——
A Pd(0)-catalyzed elimination of an allylic acetate generates a π-allyl complex that is postulated to initiate a novel intramolecular Diels–Alder cycloaddition to a tethered furan (IMDAF). Under the reaction conditions, this convergent, microwave-accelerated cascade process provides substituted indoles in moderate to good yields after Pd-hydride elimination, aromatization by dehydration, and in situ
Acylamino heteroaryl compounds in which the heteroaryl nucleus is a 5-membered ring containing a single heteroatom, which may be oxygen, or sulphur, methods of making the compounds and pharmaceutical formulations containing the compounds. The compounds have anti-allergy activity.
Acylamino heteroaryl compounds in which the heteroaryl nucleus is a 5-membered ring containing a single heteroatom, which may be oxygen, or sulphur, methods of making the compounds and pharmaceutical formulations containing the compounds. The compounds have anti-allergy activity.