Direct anodic (thio)acetalization of aldehydes with alcohols (thiols) under neutral conditions, and computational insight into the electrochemical formation of the acetals
A versatile protocol for the production of acetals/thioacetals by means of direct electrochemical oxidation is developed here under neutral conditions, providing (thio)acetals with good functional group tolerance and a wide scope for both aldehydes and (thio)alcohols. DFT calculations reveal that direct electron transfer from the anode plays a key role in carbonyl activation during this acid free acetalization
[EN] A METHOD OF ACETALIZING AN ALDEHYDE<br/>[FR] PROCÉDÉ D'ACÉTALISATION D'UN ALDÉHYDE
申请人:AGENCY SCIENCE TECH & RES
公开号:WO2013137830A1
公开(公告)日:2013-09-19
A method of acetalizing an aldehyde comprising reacting said aldehyde with an alcohol in the presence of a polymeric catalyst to form an acetal wherein the polymeric catalyst is a mesoporous poly-melamine-formaldehyde polymer.
一种使醛发生缩醛化的方法,包括将所述醛与醇在多孔聚三聚氰胺-甲醛聚合物的催化下反应,形成缩醛。
Highly Efficient Transdithioacetalization of Acetals Catalyzed by Silica Chloride
A modified procedure for the preparation of a silica chloride with higher chloride capacity than that reported is described. Moreover, this silica chloride was found to be an effective catalyst for chemoselective and highly efficient transdithioacetalization of different classes of acetals.
A method of acetalizing an aldehyde comprising reacting said aldehyde with an alcohol in the presence of a polymeric catalyst to form an acetal wherein the polymeric catalyst is a mesoporous poly-melamine-formaldehyde polymer.
Bio-based glycerol and aldehydes have been valorised by acetalization reaction over novel macroporous sulfonated polystyrene-type resins (MR-SP20-SO3H and MR-SP50-SO3H). The influence of reactants molar ratio, catalyst amount, temperature, and reaction time on the activity and selectivity to acetals have been investigated. Results showed that MR-SP20-SO3H and MR-SP50-SO3H confirm a high performance
生物基甘油和醛已通过缩醛化反应在新型大孔磺化聚苯乙烯型树脂(MR-SP20-SO 3 H 和 MR-SP50-SO 3 H)上获得价值。研究了反应物摩尔比、催化剂用量、温度和反应时间对缩醛活性和选择性的影响。结果表明,MR-SP20-SO 3 H 和 MR-SP50-SO 3 H 证实了在甘油衍生物 1,2-丙二醇、1,3-丙二醇、3-甲氧基-1,2-丙二醇的缩醛化中的高性能和单醋精;这些催化系统可实现回收和再利用。