[EN] TRANSITION METAL-CATALYZED PROCESSES FOR THE PREPARATION OF N-ALLYL COMPOUNDS AND USE THEREOF [FR] PROCÉDÉS CATALYSÉS PAR MÉTAL DE TRANSITION POUR LA PRÉPARATION DE COMPOSÉS DE N-ALLYLE ET UTILISATION DE CEUX-CI
Intermolecular Phosphite-Mediated Radical Desulfurative Alkene Alkylation Using Thiols
作者:John M. Lopp、Valerie A. Schmidt
DOI:10.1021/acs.orglett.9b03018
日期:2019.10.4
report herein the development of a S atom transfer process using triethylphosphite as the S atom acceptor that allows thiols to serve as precursors of C-centered radicals. A range of functionalized and electronically unbiased alkenes including those containing common heteroatom-based functional groups readily participate in this reductive coupling. This process is driven by the exchange of relatively
SYNTHESIS OF γ,δ-UNSATURATED KETONES BY THE INTRAMOLECULAR DECARBOXYLATIVE ALLYLATION OF ALLYL β-KETO CARBOXYLATES AND ALKENYL ALLYL CARBONATES CATALYZED BY MOLYBDENUM, NICKEL,AND RHODIUM COMPLEXES
作者:Jiro Tsuji、Ichiro Minami、Isao Shimizu
DOI:10.1246/cl.1984.1721
日期:1984.10.5
Allyl β-keto carboxylates and alkenyl allyl carbonates were converted to γ,δ-unsaturated ketones by the intramolecular decarboxylative allylation catalyzed by molybdenum, nickel, and rhodium complexes.
Allylation of carbonucleophiles with allylic carbamates underneutralconditions has been studied. The C-allylation of carbonucleophile is competitive with the N-allylation of amines, and the structure of amines is crucial for the selectivity. Bulky secondary amines gave the best results. Also a new method of protection-deprotection of amines as carbamates has been developed. Smooth deprotection is
Allylic Amination via Decarboxylative C-N Bond Formation
作者:Jon A. Tunge、Shelli R. Mellegaard-Waetzig、Dinesh Kumar Rayabarapu
DOI:10.1055/s-2005-918949
日期:——
This manuscript details the development of a palladium-catalyzed allylic amination that proceeds via decarboxylation of allylic carbamates. Both saturated and aromatic heterocycles undergo decarboxylative rearrangement in good yields. The mechanism of allylation of heteroaromatic amines involves the formation of Ï-allyl palladium complexes followed by decarboxylation of the carbamate. Finally, the heteroaromatic anion equivalent is allylated to provide allylic amines.