An Effective Use of Benzoic Anhydride and Its Derivatives for the Synthesis of Carboxylic Esters and Lactones: A Powerful and Convenient Mixed Anhydride Method Promoted by Basic Catalysts
4-(dimethylamino)pyridine. A similar reaction occurs with triethylamine when using a catalytic amount of 4-(dimethylamino)pyridine 1-oxide as an effective promoter for the intramolecular condensation reaction. These methods are successfully applied to the synthesis of erythro-aleuritic acid lactone and an eight-membered-ring lactone moiety of octalactins A and B. The efficiency of the cyclizations is
In the presence of a catalytic amount of Lewis acid, various carboxylic esters or S-phenyl carbothioates are prepared in excellent yields by the respective reactions of equimolar amounts of silyl carboxylates and alkyl silyl ethers or phenyl silyl sulfides with 4-trifluoromethylbenzoic anhydride.
Various carboxylic esters are prepared in excellent yields by the reaction of nearly equimolar amounts of silyl derivatives of carboxylicacids and alcohols with p-trifluoromethylbenzoic anhydride in the presence of a catalytic amount of Lewis acid.
Biomimetic total synthesis of colneleic acid and its function as a lipoxygenase inhibitor
作者:E.J. Corey、Ryu Nagata、Stephen W. Wright
DOI:10.1016/s0040-4039(00)96658-9
日期:1987.1
A biomimetic synthesis of colneleicacid (2) from 9(S)-hydroperoxy-10(E),12(Z)-octadecadienoic acid (1) is reported. The lipoxygenase of potato which converts linoleic acid to 1 was found to be strongly inhibited by acid 2 (Ki = 8μM).
据报道,由9(S)-氢过氧-10(E),12(Z)-十八碳二烯酸(1)仿生合成了烯乙酸(2)。发现将亚油酸转化为1的马铃薯的脂氧合酶被酸2(K i =8μM)强烈抑制。
Process for the solid phase synthesis of aldehyde, ketone, oxime, amine, hydroxamic acid and alpha, beta-unsaturated carboxylic acid and aldehyde compounds
申请人:——
公开号:US20020183558A1
公开(公告)日:2002-12-05
This invention is directed to a process for the solid phase synthesis of aldehyde, ketone, oxime, amine, hydroxamic acid and (&agr;,&bgr;-unsaturated carboxylic acid and aldehyde compounds and to polymeric hydroxylamine resin compounds useful therefor.