Various cyclic and acyclic ethers are efficiently cleaved with acyl chlorides or bromides to give ω-chloro- or ω-bromoesters under high-pressure conditions.
在高压条件下,各种环状和无环醚可以用酰氯或溴化物有效裂解,得到 ω-氯-或 ω-溴酯。
Palladium(II) acetate catalyzed acylative cleavage of cyclic and acyclic ethers under neat conditions
作者:Jean Fotie、Brandy R. Adolph、Shreya V. Bhatt、Casey C. Grimm
DOI:10.1016/j.tetlet.2017.10.080
日期:2017.12
During the development of a palladiumcatalyzed C–H activation cross-coupling reaction involving acyl halides, it was noted that palladium(II) acetate catalyzes the acylative cleavage of tetrahydrofuran (used as a solvent) at room temperature to afford the corresponding 4-chlorobutyl ester derivative. After optimization, the reaction was shown to work well with epoxides, oxetane and tetrahydrofuran
an efficient catalyst for the acylativecleavage of C–O bond of ethers with acyl chlorides. When acyclic ethers were allowed to react with acyl chlorides in the presence of a catalytic amount of ReBr(CO)5, acylativecleavage of C–O bond of acyclic ethers smoothly proceeded to give the corresponding esters in moderate to good yields. Similarly, cyclicethers were acylative cleaved by acyl chlorides to
发现rh络合物是醚与酰氯的C-O键的酰基化裂解的有效催化剂。当在催化量的ReBr(CO)5存在下使无环醚与酰氯反应时,无环醚的C-O键的酰基裂顺利进行,从而以中等至良好的收率得到了相应的酯。类似地,使用Re 2 O 7催化剂将环醚酰基氯酰化裂解,得到高产率的相应的氯取代的酯。
Synthesis of n-alkyl terminal halohydrin esters from acid halides and cyclic ethers or thioethers under solvent- and catalyst-free conditions
efficient and eco-friendly protocol has been developed for the preparation of n-alkyl terminal halohydrin esters under solvent- and catalyst-free conditions. Ring opening of cyclic ethers by organic acid halides affords the 1,4- and 1,5-halohydrins, OH-protected by different acyl groups. The green reaction conditions, simple work-up procedures, high yields and broad substrate scope of the reaction highlight
[EN] AZABENZIMIDAZOLES AS RESPIRATORY SYNCYTIAL VIRUS ANTIVIRAL AGENTS<br/>[FR] AZABENZIMIDAZOLES EN TANT QU'AGENTS ANTIVIRAUX CONTRE LE VIRUS RESPIRATOIRE SYNCYTIAL
申请人:JANSSEN R & D IRELAND
公开号:WO2012080449A1
公开(公告)日:2012-06-21
A compound satisfying formula I, a prodrug, N-oxide, addition salt, quaternary metal complex, or a stereochemically isomeric form thereof; (formula I) compositions contain these compounds as active ingredient and processes for preparing these compounds and compositions.