We report here a Ni-catalyzed reductive coupling of aldehydes with widely available 1,3-dienes under visible-light photoredox dualcatalysis. The homoallyic alcohols are obtained in broad scope with complete branched regioselectivity. Hantzsch ester is used as the hydrogen radical source to oxidize low-valent nickel salt affording Ni–H species. Preliminary mechanistic studies indicate a successive
Solvent Assisted Addition of Tetraallylic, Tetraallenic and Tetrapropargylic Stannanes to Aldehydes and Acetals
作者:Adam McCluskey、I Wayan Muderawan、Muntari Young、David J. Young
DOI:10.1055/s-1998-1807
日期:1998.8
Tetraallylic, tetraallenic and tetrapropargylic stannanes (0.25 eq) react with aldehydes in methanol to provide unsaturated alcohols. These reactions proceed in methanol to provide unsaturated alcohols. These reactions proceed exclusively with allylic rearrangement for tetra(2-butenyl)tin 2b and tetra(1,2-butadienyl)tin 5e and predominantly with allylic rearrangement for tetrapropadienyltin 5c and tetra(2-butynyl)tin 6e. The corresponding TFA catalysed reactions of dimethyl acetals with 5c and 6e are highly regioselective with allylic rearrangement.
The Employment of Indium Nanoparticles in Barbier-type Reaction of Allylic Chloride in Water
作者:Jiaming Li、Zhenggen Zha、Lilin Sun、Yan Zhang、Zhiyong Wang
DOI:10.1246/cl.2006.498
日期:2006.5
Indium nanoparticles have been employed in the reactions of various carbonyl compounds with allyl (crotyl) chloride in water, affording the corresponding alcohols with high yields. The crotylation gave exclusive γ-adducts with a dominant syn-isomer.
Addition of crotyltitanocenes to aldehydes: influence of cyclopentadienyl substituents on the diastereoselective formation of homoallylic alcohols
作者:Scott Collins、Warren P. Dean、David G. Ward
DOI:10.1021/om00101a007
日期:1988.11
A Highly Atom Efficient, Solvent Promoted Addition of Tetraallylic, Tetraallenic, and Tetrapropargylic Stannanes to Carbonyl Compounds
作者:Adam McCluskey、I. Wayan Muderawan、Muntari、David J. Young
DOI:10.1021/jo015904x
日期:2001.11.1
Tetraallylic, tetraallenic, and tetrapropargylic stannanes (0.25 equiv) react with aldehydes in methanol to provide unsaturated alcohols in good to excellent yields (56-99%). These reactions proceed exclusively with allylic rearrangement for tetra(2-butenyl)tin 2b and tetra(1,2-butadienyl)tin 16c and predominantly with allylic rearrangement for tetrapropadienyltin 16a and tetra(2-butynyl)tin 6e. Allylation. reactions also proceeded smoothly with reactive ketones such as ethyl pyruvate (9a) and cyclohexanone (9b). The corresponding TFA-catalyzed reactions of dimethyl acetals 4d and 4e are regiospecific with allylic rearrangement.