Triflic Acid Catalyzed Reductive Coupling Reactions of Carbonyl Compounds with O-, S-, and N-Nucleophiles
作者:Beate A. Gellert、Nils Kahlcke、Markus Feurer、Stefanie Roth
DOI:10.1002/chem.201101819
日期:2011.10.17
Highly efficient metal‐free reductivecoupling reactions of aldehydes and ketones with a range of nucleophiles in the presence of triflic acid (1–5 mol %) as the catalyst are presented. The reactions can be performed at ambient temperature without exclusion of moisture or air. A range of symmetrical and unsymmetrical ethers were obtained by this method in high yields and short reaction times. For the
SOLID STATE DEPROTECTION OF THIOACETALS AND THIOKETALS USING 1-BENZYL-4-AZA-1-AZONIABICYCLO[2.2.2]OCTANE PERIODATE AND ALUMINUM CHLORIDE
作者:Abdol Reza Hajipour、Arnold E. Ruoho
DOI:10.1080/00304940509354965
日期:2005.6
for deprotection of thioacetals and thioketals. In recent years, there has been an increasing interest in reactions that proceed in the absence of solvent due to reduced pollution, low costs and simplicity in process and straightforward w~rk-up .~ Because of our interest in development of solvent-free reactions? we now report 1 -benzyl-4-aza-l-azoniabicyclo[2.2.2]octane periodate 1 as an efficient and
Cyanuric chloride-catalyzed thioacetalization for organocatalytic synthesis of thioacetals
作者:Yaqin Liu
DOI:10.1080/10426507.2015.1054934
日期:2016.5.3
GRAPHICAL ABSTRACT ABSTRACT The thioacetalization of aromatic aldehydes has been realized with broad diversity in the presence of various thiols and thiophenols using cyanuric chloride as an organocatalyst.
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.
An Expedient and Efficient Method for the Cleavage of Dithioacetals to the Corresponding Carbonyl Compounds Using Organic Ammonium Tribromide (OATB)
作者:Ejabul Mondal、Gopal Bose、Abu T. Khan
DOI:10.1055/s-2001-14579
日期:——
A variety of dithioacetals of aldehydes or ketones 1 can be easily cleaved into the parent carbonyl compounds 2 at 0-5 °C in very high yields by employing organic ammonium tribromides such as cetyltrimethyl-ammonium tribromide (CetTMATB) or tetrabutylammonium tribromide (TBATB) in dichloromethane.
通过使用有机三溴化铵,如二氯甲烷中的十六烷基三甲基三溴化铵 (CetTMATB) 或四丁基三溴化铵 (TBATB),各种醛或酮的二硫代乙醛 1 可在 0-5 °C 的温度下轻松裂解成母体羰基化合物 2,而且产率非常高。