Iminoxy derivatives of indole and indene compounds as inhibitors of
申请人:Abbott Laboratories
公开号:US05756531A1
公开(公告)日:1998-05-26
The present invention provides a class of substituted indole and indene iminoxy derivatives of the formula ##STR1## which inhibit leukotriene biosynthesis and are useful in the treatment of allergic and inflammatory disease states.
Process for the preparation of 2,3-dialkoxypropanals
申请人:BASF Aktiengesellschaft
公开号:US05081313A1
公开(公告)日:1992-01-14
The preparation of 2,3-dialkoxypropanals of the general formula I ##STR1## in which R.sup.1 and R.sup.2 denote C.sub.1 -C.sub.8 -alkyl or C.sub.5 - or C.sub.6 -cycloalkyl which may or may not bear substituents which are inert under the conditions of the reaction, wherein a 1,2-dialkoxy ethene of the general formula II R.sup.1 O--HC.dbd.CH--OR.sup.2 (II) is reacted with carbon monoxide and hydrogen in the presence of a rhodium-containing catalyst.
Base-catalyzed β-elimination of 2,3-di-O-methyl-d-glyceraldehyde
作者:Michal Fedoroňko、Mária Petrušová、Tibor Sticzay
DOI:10.1016/0008-6215(83)88136-1
日期:1983.4
Abstract 2,3-Di- O -methyl- d -glyceraldehyde undergoes base-catalyzedβ-elimination with formation of 2-methoxypropenal in two steps by the ElcB mechanism. The first step is a rapid, reversible, general base-catalyzed reaction giving an anionic intermediate of 2,3-di- O -methyl- d -glyceraldehyde. The second, slower step involves liberation of methoxide ion from the intermediate to give 2-methoxypropenal