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Synthesis of Functionalized [3], [4], [5] and [6]Dendralenes through Palladium‐Catalyzed Cross‐Couplings of Substituted Allenoates
Author(s) -
Lippincott Daniel J.,
Linstadt Roscoe T. H.,
Maser Michael R.,
Lipshutz Bruce H.
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201609636
Subject(s) - palladium , regioselectivity , catalysis , nucleophile , boron , chemistry , combinatorial chemistry , nucleophilic aromatic substitution , nucleophilic substitution , nanotechnology , organic chemistry , materials science
A mild method for the synthesis of highly functionalized [3]–[6]dendralenes is reported, representing a general strategy to diversely substituted higher homologues of the dendralenes. The methodology utilizes allenoates bearing various substitution patterns, along with a wide range of boron and alkenyl nucleophiles that couple under palladium catalysis leading to sp‐, sp 2 ‐, and sp 3 ‐substituted arrays. Regioselective transformations of the newly formed unsymmetrical dendralene derivatives are demonstrated. The use of micellar catalysis, where water is the global reaction medium, and room temperature reaction conditions, highlights the green nature of this technology.