Specific <i>Z</i>-Selectivity in the Oxidative Isomerization of Allyl Ethers to Generate Geometrically Defined <i>Z</i>-Enol Ethers Using a Cobalt(II)(salen) Complex Catalyst
作者:Guanxin Huang、Miaolin Ke、Yuan Tao、Fener Chen
DOI:10.1021/acs.joc.0c00004
日期:2020.4.17
synthesis of the geometrically less stable Z-enol ethers is challenging. An efficient Z-selective oxidative isomerization process of allyl ethers catalyzed by a cobalt(II) (salen) complex using N-fluoro-2,4,6-trimethylpyridinium trifluoromethanesulfonate (Me3NFPY•OTf) as an oxidant has been developed. Thermodynamically less stable Z-enol ethers were prepared in excellent yields with high geometric control.
Acid-catalyzed allylatingreagent 2,4,6-tris(allyloxy)-1,3,5-triazine (TriAT-allyl) and its substituted derivatives have been developed. The reaction of acid-, and alkali-labile alcohols with these reagents in the presence of a catalytic amount of trifluoromethanesulfonic acid (TfOH) afforded the corresponding allyl ethers in good yields. Reactions using these reagents with an unsymmetrically-substituted
Synthesis of a Phosphinate Analogue of the Antitumour Phospholipid Edelfosine
作者:Marios S. Markoulides、Andrew C. Regan
DOI:10.1002/ejoc.201500477
日期:2015.8
comprised the free-radicaladdition reaction of phosphinic acid to a functionalised allyl ether, to incorporate the hydrophobic tail into a monosubstituted H-phosphinic acid. The hydrophilic head group was then added by using a silyl phosphonite based Michael addition. The reported synthetic study lays the groundwork for the synthesis of modified phosphinate phospholipid derivatives to facilitate investigations
1-(2-Hydroxy-3-n-alkoxypropyl)-4-substituted-piperazines and piperidines
申请人:Pfizer Inc.
公开号:US04255426A1
公开(公告)日:1981-03-10
1-(2-Hydroxy-3-n-alkoxypropyl)-4-substituted-piperazines and piperidines and derivatives thereof useful as immune regulants are disclosed. Also disclosed are pharmaceutical compositions containing the novel compounds and a method of regulating the immune response of a subject by administration of the novel compounds.
1-(2-Hydroxy-3-n-alkoxypropyl)-4-substituted-piperazines and piperidines and derivatives thereof useful as immune regulants are disclosed. Also disclosed are pharmaceutical compositions containing the novel compounds and a method of regulating the immune response of a subject by administration of the novel compounds.