Photochemical generation of radical species from α-Stannyl ethers and their reaction with conjugate enones
Photochemical reaction of α-stannyl ethers and conjugated enones proceeds in the presence of photosensitizers to give addition products of aryloxymethyl radicals to the enones.
Secondary Phosphine Oxides as Multitalented Preligands En Route to the Chemoselective Palladium-Catalyzed Oxidation of Alcohols
Secondary phosphine oxides O=PHR2 (SPOs) were identified as multitalented preligands for the chemoselective Pd-catalyzed oxidation of alcohols by a hydrogen-abstracting methodology. SPOs were found to promote the hydrogen-abstraction step as well as hydrogen transfer to a Michael acceptor by generating a putative active H?Pd species. The catalytic system operates under neutral conditions and was proven to be compatible with various electrophilic and nucleophilic functionalities within the substrates as well as water- and air-sensitive functional groups.
Chemoselective, iron(ii)-catalyzed oxidation of a variety of secondary alcohols over primary alcohols utilizing H2O2 as the oxidant
A mild, iron-based catalyst system is presented that selectively oxidizes secondary alcohols to the corresponding hydroxy ketones in the presence of primary alcohols within 15 minutes at room temperature, utilizing H 2O2 as the oxidant.
Lenze, Matthew,Bauer, Eike B.
supporting information
p. 5889 - 5891
(2013/07/19)
Nucleophilic Reactivity of Zinc and Copper Carbenoids. 2
The rectivity of the new zinc and copper carbenoids PivOCH2Cu(CN)ZnI (4) and ICH2Cu*ZnI2 (5) toward various electrophiles has been investigated.Of special interest is the direct and highly stereoselective conversion of allylic bromides to the corresponding homoallylic iodides by using the reagent ICH2Cu*ZnI2
Knochel, Paul,Chou, Tso-Sheng,Chen, Huai Gu,Yeh, Ming Chang P.,Rozema, Michael J.
p. 5202 - 5204
(2007/10/02)
SILAFUNCTIONAL COMPOUNDS IN ORGANIC SYNTHESIS. 28. CONJUGATE ADDITION OF A HYDROXYMETHYL ANION SYNTHON TO α,β-ENONES
The title reaction has been achieved by a sequence of the copper-catalyzed conjugate addition of the (allyldimethylsilyl)methyl Grignard reagent, fluorodeallylation and the H2O2-oxidation of the carbon-silicon bond therein.
Tamao, Kohei,Ishida, Neyoshi
p. 4249 - 4252
(2007/10/02)
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