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。
Regioselective ring cleavage of oxiranes catalyzed by organotin halide - triphenylphosphine complex
作者:Ikuya Shibata、Akio Baba、Haruo Matsuda
DOI:10.1016/s0040-4039(00)84706-1
日期:1986.1
Vicinal chloroesters are formed in high yield from the reaction of oxiranes and benzoylchloride in the presence of organotin halide - triphenylphosphine complex with enhanced regioselectivity in oxirane ring cleavage.
Organomercury/aluminum-mediated acylative cleavage of cyclic ethers
作者:Frederick A. Luzzio、Rhiana A. Bobb
DOI:10.1016/s0040-4020(98)01226-5
日期:1999.2
tetrahydrofurans are cleaved with concomitant acylation to chloroalkyl esters using a reagent system composed of an organomercurial, aluminum metal and an acid chloride. The cleavage is promoted under mild conditions by a range of readily-available cyclic β-alkoxychloromercurials and acid chlorides. Using mainly tetrahydrofuran and cyclohexene oxide as substrates, the yield of isolated chloroesters ranged from 52