Pr(OTf)<sub>3</sub> as an Efficient and Recyclable Catalyst for Chemoselective Thioacetalization of Aldehydes
作者:Surya De
DOI:10.1055/s-2004-834858
日期:——
Praseodymium triflate has been found to be an efficient and recyclable catalyst for chemoselective protection of aldehydes.
三氟甲磺酸镨已被发现是一种高效且可循环的催化剂,适用于醛的选择性保护反应。
AN EFFICIENT METHOD FOR THE THIOACETALIZATION OF CARBONYL COMPOUNDS IN THE PRESENCE OF CATALYTIC AMOUNTS OF BENZYLTRIPHENYLPHOSPHONIUM TRIBROMIDE
作者:A. R. Hajipour、S. A. Pourmousavi、A. E. Ruoho
DOI:10.1080/00304940709458596
日期:2007.8
in multi-step syntheses. Among carbonyl protecting groups, dithioacetals constitute an important class of compounds as acyl anion equivalents' or masked methylene functions in carbon-carbon bond forming reactions. They are versatile2 due to their straightforward preparation and also to their stability under basic or mildly acidicconditions. Although several methods have been reported for protection
A convenient method for the preparation of cyclic ketals and thioketals using zirconium sulfophenyl phosphonate as catalyst is described.
描述了一种使用磺基酚磷酸锆作为催化剂制备环酮和硫酮的便利方法。
Ruthenium(III) Chloride-Catalyzed Thioacetalization of Carbonyl Compounds: Scope, Selectivity, and Limitations
作者:Surya?Kanta De
DOI:10.1002/adsc.200404323
日期:2005.4
A variety of carbonyl compounds can be easily and rapidly converted to the corresponding cyclic and acylic dithioacetals in the presence of a catalytic amount of ruthenium chloride in acetonitrile at room temperature. Some of the major advantages of this protocol are high chemoselectivity, operational simplicity, very short reaction times, high yields, and also compatibility with other protecting groups
Iron(III) Fluoride: A Highly Efficient and Versatile Catalyst for the Protection of Carbonyl Compounds under Solvent-Free Conditions
作者:Babasaheb P. Bandgar、Vinod T. Kamble、Ashwini Kulkarni
DOI:10.1071/ch05067
日期:——
Carbonylcompounds are successfully converted into oxathioacetals and dithioacetals with 2-mercaptoethanol and ethane-1,2-dithiol using a catalytic amount of iron(iii) fluoride under solvent-free conditions. The catalysts were recovered and reused in various runs without affecting the efficiency of the process.