Chemoenzymatic synthesis of a focused library of enantiopure structured 1-O-alkyl-2,3-diacyl-sn-glycerol type ether lipids
作者:Carlos D. Magnusson、Anna V. Gudmundsdottir、Gudmundur G. Haraldsson
DOI:10.1016/j.tet.2011.01.032
日期:2011.3
A highly efficient two-step chemoenzymatic synthesis of enantiopure structured ether lipids of the 1-O-alkyl-2,3-diacyl-sn-glycerol type has been developed. Chimyl, batyl and selachyl alcohols possessing pure saturated fatty acid (SFA) attached to the sn-3 position and pure EPA and DHA attached to the sn-2 position were obtained under full regiocontrol. This was offered by mild conditions and a highly
已经开发了1- O-烷基-2,3-二酰基-sn-甘油类型的对映纯结构化醚脂质的高效两步化学酶法合成。在完全区域控制下,获得了具有附接到sn -3位置的纯饱和脂肪酸(SFA)和附接到sn -2位置的纯EPA和DHA的Chimyl,batyl和selachyl醇。这是由温和条件和在室温下运行的高效脂肪酶提供的。高分辨率11 H NMR光谱法用于监测反应的进程,并通过跟踪参与这些反应的所有预期加合物来评估所涉及反应的完全区域控制。这扩展为针对C 2 -C 16的所有偶数SFA以及八个相应的EPA和DHA结构化的二酰基甘油醚(DAGE)产品(用于chimyl,batyl和selachyl醇)的八个单酰基中间加合物的重点文库的制备。总共72种化合物。
A Simple and Efficient Method for Direct Acylation of Acetals with Long Alkyl-Chain Carboxylic Acid Anhydrides
作者:Stephan D. Stamatov、Jacek Stawinski
DOI:10.1016/s0040-4020(00)00924-8
日期:2000.12
We have developed an efficient and simple method for direct transformation of acetals to carboxylicacid esters. The method consists of treatment of acetals with carboxylic anhydrides in the presence of borontrifluoride etherate as a catalyst and affords the corresponding ester derivatives in high yields with retention of configuration in the alcohol moiety. Some mechanistic aspects of this synthetically
Acetyl glyceryl ether phosphorylcholines (platelet-activating factors ; PAFs), their enantiomers, and their analogues were efficiently synthesized in a stereochemically unambiguous manner starting from D-and L-tartaric acids as chiral synthons. The enantiomer of C16-PAF (S-comfiguration) showed far less activity than the natural PAF (R-configuration), and the N-methylpiperidine and N-methylpyrrolidine analogues were found to possess much higher activity than natural C16-PAF.
Sulfated glyceroglucolipids as inhibitors of bacterial adherence
申请人:The Procter & Gamble Company
公开号:US05116821A1
公开(公告)日:1992-05-26
The subject invention involves pharmaceutical compositions comprising a sulfated glyceroglucolipid having the structure: ##STR1## wherein n is an integer of from 1 to about 5, R is hydrogen or C.sub.1 -C.sub.24 acyl or alkyl, R' is hydrogen or C.sub.1 -C.sub.24 acyl or alkyl, and M.sup.+ is a cationic moiety, and methods of treating or preventing gastroduodenal diseases or disorders caused by or associated with H. pylori by administering such compounds.
Phosphocholine derivative inhibitors of phospholipase A.sub.2
申请人:American Cyanamid Company
公开号:US05144045A1
公开(公告)日:1992-09-01
Phospocholine derivatives having the formula: ##STR1## in which W, Z, Q and R are described in the specification are disclosed as useful for inhibiting the enzyme phospholipase A.sub.2. Methods of making and using the compounds are also disclosed.