Copper(II) Tetrafluoroborate-Catalyzed Formation of Aldehyde-1,1-diacetates<sup />
作者:Asit K. Chakraborti、Ramasamy Thilagavathi、Raj Kumar
DOI:10.1055/s-2004-816000
日期:——
Aldehyde 1,1-diacetates are formed in excellent yields from aldehydes and acetic anhydride under solvent-free conditions at room temperature in short times in the presence of a catalytic amount of copper(II) tetrafluoroborate hydrate.
Montmorillonite Clay Catalysis. Part 4.1 An Efficient and Convenient Procedure for Preparation of 1,1-Diacetates from Aldehydes
作者:Zhan-Hui Zhang、Tong-Shuang Li、Cheng-Guang Fu
DOI:10.1039/a608318h
日期:——
An easy preparation of 1,1-diacetates from
aldehydes with montmorillonite clays as catalysts has been
carried out in excellent yield.
使用蒙脱石粘土作为催化剂,从醛类中高效地制备了1,1-二乙酸酯,产率极佳。
Supported N-propylsulfamic acid onto Fe3O4 magnetic nanoparticles as a reusable and efficient nanocatalyst for the protection/deprotection of hydroxyl groups and protection of aldehydes
作者:Amin Rostami、Bahman Tahmasbi、Fatemeh Abedi
DOI:10.1007/s11164-015-2239-3
日期:2016.4
nanocatalyst has been reported for the tetrahydropyranylation/depyranylation of a wide variety of alcohols and phenols by changing the solvent medium. Also, the protection of aldehydes as acylals using Ac2O in the presence of catalytic amount MNPs-PSA in good to high yields at room temperature undersolvent-freeconditions is described. After completing the reaction, the catalyst was easily separated from the
已经报道了负载在Fe 3 O 4磁性纳米颗粒(MNPs-PSA)上的 N- 丙基氨基磺酸作为一种有效的和可磁重复使用的纳米催化剂,可以通过改变溶剂介质将其用于多种醇和酚的四氢吡喃基化/脱吡喃基化。此外,还描述了在无溶剂条件下,在室温下,在催化量的MNPs-PSA存在下,使用Ac 2 O以高至高收率保护醛作为酰基的醛。反应完成后,借助外部磁场可以很容易地将催化剂从反应混合物中分离出来,并连续使用几次,而不会明显降低其催化效率。
Diacetates From Aldehydes in the Presence of Zeolites
作者:Carlos Pereira、Bárbara Gigante、M. J. Marcelo-Curto、Helène Carreyre、Guy Pérot、Michel Guisnet
DOI:10.1055/s-1995-4073
日期:1995.9
An easy preparation of diacetates from aldehydes and acetic anhydride in the presence of zeolites is reported.
报道了一种在沸石存在下,由醛和乙酸酐制备二乙酸酯的简便方法。
CARO'S ACID SUPPORTED ON SILICA GEL. PART VI. A MILD REAGENT FOR REGENERATION OF CARBONYL COMPOUNDS FROM ACETALS, KETALS, AND 1,1-DIACETATES
作者:M. M. Lakouraj、M. Tajbakhsh、V. Khojasteh、M. H. Gholami
DOI:10.1080/10426500490494750
日期:2004.12.1
Efficient conversion of acetals, ketals, and diacetates to carbonylcompounds is described using Caro's acid supported on silica gel. The deacetalization reactions are carried out in acetonitrile at room temperature. Reaction of diacetates is performed in refluxing dichloromethane, and their parent carbonylcompounds are obtained in good-to-excellent yields.
使用负载在硅胶上的 Caro 酸描述了缩醛、缩酮和二乙酸酯向羰基化合物的有效转化。脱缩醛反应在室温下在乙腈中进行。双乙酸酯在回流二氯甲烷中反应,得到母体羰基化合物,产率从优到优。