Synthesis of homoallylic alcohols by allylation of aldehydes and ketones catalysed by a mesoporous material (MCM-41)-supported cyano palladium complex
作者:Fang Yao、Bin Huang、Mingzhong Cai
DOI:10.3184/030823409x460911
日期:2009.6
variety of homoallylic alcohols has been conveniently synthesised in good to high yields by the allylation of aldehydes and ketones with allylic chlorides catalysed by an MCM-41-supported cyano palladiumcomplex in DMF using SnCl2 as reducing agent. This polymeric palladiumcomplex can be recovered and reused with some loss of activity.
highly efficient Pd/Xiang-Phos catalyzedenantioselective carboetherification of alkenyl oximes with either aryl or alkenyl halides, delivering various chiral 3,5-disubstituted and 3,5,5-trisubstituted isoxazolines in good yields with up to 97 % ee. The sterically bulky and electron-rich (S,Rs)-NMe-X2 ligand is responsible for the excellent reactivities and enantioselectivities. The salient features of this
Organomanganese (II) reagents XX: Manganese mediated Barbier and Reformatsky like reactions an efficient route to homoallylic alcohols and β-acetoxyesters
作者:Gérard Cahiez、Pierre-Yves Chavant
DOI:10.1016/s0040-4039(00)70700-3
日期:1989.1
Allylic halides and α-bromoesters react with manganese metal in ethyl acetate; THF can also be used as solvent if a catalytic amount of zinc chloride is added to the reaction mixture. When the reaction is performed in the presence of various aldehydes or ketones, excellent yields of 1,2-addition products are obtained in preparative conditions.
Homoallylic alcohols from samarium diiodide-mediated coupling of allylic sulfones with carbonyl compounds
作者:Jonathan Clayden、Marc Julia
DOI:10.1039/c39940002261
日期:——
Reduction of allylic sulfones with samarium diiodide gives allylsamarium species which react in situ with carbonyl compounds, yielding homoallylic alcohols.
2-Propenyl tin species, prepared from 3-halopropenes or 2-propenyl mesylate with tin(IV) chloride and tetrabutylammoniumiodide in dichloromethane, causes nucleophilic addition to aldehydes to produce the corresponding homoallylic alcohols.