Palladium-Catalyzed Dehydrative Cross Couplings of Stabilized Phosphorus Ylides with Allylic Alcohols
نویسندگان
چکیده
منابع مشابه
Palladium-catalyzed stereospecific cross-coupling of enantioenriched allylic alcohols with boronic acids.
In the presence of 2.5 mol% Pd2(dba)3-TMEDA (1 : 4), a range of enantioenriched allylic alcohols smoothly coupled with boronic acids in a highly regioselective fashion with inversion of configuration to afford structurally diverse alkenes in good yields with perfect retention of ee.
متن کاملPalladium(0)-catalyzed direct cross-coupling reaction of allylic alcohols with aryl- and alkenylboronic acids.
Allylic alcohols can be used directly for the palladium(0)-catalyzed allylation of aryl- and alkenylboronic acids with a wide variety of functional groups. A triphenylphosphine-ligated palladium catalyst turns out to be most effective for the cross-coupling reaction and its low loading (less than 1 mol%) leads to formation of the coupling product in high yield. The Lewis acidity of the organobo...
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Various allylic alcohols reacted with n-butyl acrylate in the presence of p-toluenesulfonic anhydride and palladium catalysts to yield the corresponding n-butyl 2,5-dienoates with high regioselectivity.
متن کاملEnantiospecific, Nickel-Catalyzed Cross-Couplings of Allylic Pivalates and Arylboroxines
We have developed an enantiospecific, nickel-catalyzed cross-coupling of unsymmetric 1,3-disubstituted allylic pivalates with arylboroxines. The success of this reaction relies on the use of BnPPh2 as a supporting ligand for the nickel(0) catalyst and NaOMe as a base. This method shows excellent functional group tolerance and broad scope in both the allylic pivalate and arylboroxine, enabling t...
متن کاملPalladium-catalyzed Heck-type reaction of oximes with allylic alcohols: synthesis of pyridines and azafluorenones.
We describe herein a palladium-catalyzed Heck-type reaction of O-acetyl ketoximes and allylic alcohols to synthesise pyridines. This protocol allows the robust synthesis of pyridines and azafluorenones in good to excellent yields with tolerance of various functional groups under mild conditions. The reaction is supposed to go through an oxidative addition of oximes to palladium(0) complexes, ge...
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ژورنال
عنوان ژورنال: Chinese Journal of Organic Chemistry
سال: 2019
ISSN: 0253-2786
DOI: 10.6023/cjoc201812051