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。
Simple, Mild and Efficient Thioacetalization and Transthioacetalization of Carbonyl Compounds and Deprotection of Thioacetals: Unique Role of Thiols in the Selectivity of Thioacetalization
Silicasupportedsodiumhydrogen sulfate (NaHSO 4 .SiO 2 ) has been employed for efficient thioacetalization and transthioacetalization of carbonyl compounds in CH 2 Cl 2 at room temperature. Selectivity of thioacetalization was dependent on the thiols used for the conversion. The same catalyst was also found to be effective for deprotection of thioacetals in CH 2 Cl 2 -H 2 O at room temperature.
A variety of aldehydes and aliphatic ketones were converted into the corresponding dithioacetals at room temperature in good yields by using small amounts of telluriumtetrachloride as a mild Lewis acid catalyst.
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
Ethyl lactate mediated thioacetalization of aldehydes at ambient temperature
作者:Jie-Ping Wan、Yanfeng Jing、Yunyun Liu
DOI:10.1080/10426507.2016.1209504
日期:2016.10.2
GRAPHICAL ABSTRACT ABSTRACT Dithioacetalization reactions of aldehydes with thiols/thiophenols have been successfully achieved at room temperature by employing the green, bio-basedethyllactate as the reaction medium. By means of this sustainableapproach, a class of dithioacetals has been acquired with high diversity and efficiency.