Selective allylation of carbonyl compounds in aqueous media
作者:Cathy Einhorn、Jean-Louis Luche
DOI:10.1016/0022-328x(87)85005-2
日期:1987.3
The use of aqueous neutral media leads to excellent yields of homoallylic alcohols from reaction sof allyl halides with carbonyl compounds in the presence of tin or zinc. The stereochemicalcourse and range of application of this reaction have been investigated.
Butyltin trichloride, as a catalyst precursor, promotes the following processes: (i) etherification of 2,3-unsaturated alcohols, (ii) etherification of functional diols, (iii) cyclization of 2,5-hexanedione, and (iv) dehydration of cyclic diols. Many examples are reported.
In situ Generation and Nucleophilic Capture of 1,n-Dial Equivalents from 1,n-Dioates (α,ω-Diesters)
作者:Thomas Hoye、Lucas Kopel、Troy Ryba
DOI:10.1055/s-2006-926465
日期:2006.5
A procedure is described for the in situ generation of functional equivalents of glutaric, succinic, and malonic dialdehydes. DIBAL-H reduction of the corresponding 1,n-dioates followed by in situ addition of a nucleophilic trapping agent allows for one-pot, bidirectional homologation. Olefination and Grignard addition classes of reactions are specifically demonstrated.
Application of Tin and Nanometer Tin in Allylation of Carbonyl Compounds in Tap Water
作者:Zhiyong Wang、Zhenggen Zha、Cunliu Zhou
DOI:10.1021/ol0257326
日期:2002.5.1
[reaction: see text] Nanometer tin-mediated allylation of aldehydes or ketones in distilled or tap water gave rise to corresponding homoallylalcohol in high yield without any other assistance such as heat or supersonic or acidic media.
Gallium-mediated allylation of carbonyl compounds in water
作者:Zhiyong Wang、Shizhen Yuan、Chao-Jun Li
DOI:10.1016/s0040-4039(02)00995-4
日期:2002.7
Ga-mediated allylation of aldehydes or ketones in distilled or tap water generated the corresponding homoallylalcohols in high yields without the assistance of either acidic media or sonication.