Directed Dihydroxylation of Cyclic Allylic Alcohols and Trichloroacetamides Using OsO<sub>4</sub>/TMEDA
作者:Timothy J. Donohoe、Kevin Blades、Peter R. Moore、Michael J. Waring、Jon J. G. Winter、Madeleine Helliwell、Nicholas J. Newcombe、Geoffrey Stemp
DOI:10.1021/jo026161y
日期:2002.11.1
The oxidation of a range of cyclicallylicalcohols and amides with OsO4/TMEDA is presented. Under these conditions, hydrogen bonding control leads to the (contrasteric) formation of the syn isomer in almost every example that was examined. Evidence for the bidentate binding of TMEDA to OsO4 is presented and a plausible mechanism described.
Reaction of butyllithium with benzylidene acetals of aldopyranosides and 1,5-anhydroalditols
作者:Derek Horton、Wolfgang Weckerle
DOI:10.1016/0008-6215(88)85099-7
日期:1988.3
butyllithium selectively cleaves 5-membered benzylidene acetals (1,3-dioxolane ring) leaving the 6-membered analogs (1,3-dioxane ring) intact in aldopyranoside and 1,5-anhydroalditol derivatives. The usual course of the reaction involves expulsion of the elements of benzaldehyde to give an enolate anion and thence a vicinal deoxyketone. The reaction is strongly regioselective and may be interpreted as proceeding
Method of preparation of heterocyclic molecules with pharmaceutical, pharmaceutical excipient, cosmeceutical, agrochemical and industrial uses
申请人:Hong Borcherng
公开号:US20060173199A1
公开(公告)日:2006-08-03
Processes for preparing racemic and optically pure 3,6-dihydro-2H-pyrans of formulae H, I, N and O are described. These compounds may be further transformed into compounds of formulae J, K, L, M, P, Q, S, T, U, V, Y and Z with potential pharmaceutical, pharmaceutical excipient, cosmeceutical, agrochemical and industrial applications.
Phenol-Free Overbased Alkaline Earth Metal Carboxylate
申请人:Ferro Corporation
公开号:US20160017118A1
公开(公告)日:2016-01-21
A phenol-free overbased alkaline earth metal carboxylate is obtained by reacting a cyclic ether alcohol, an alkaline earth metal hydroxide, a fatty carboxylic acid, carbon dioxide, an optional fatty alcohol, and an optional liquid hydrocarbon solvent or oil.