Enzymes in Organic Chemistry, 11:[1] Hydrolase-Catalyzed Resolution ofα- andβ-Hydroxyphosphonates and Synthesis of Chiral, Non-Racemicβ-Aminophosphonic Acids
作者:A. Woschek、Wolfgang Lindner、F. Hammerschmidt
DOI:10.1002/adsc.200303135
日期:2003.12
enantioselective acylation of racemic diisopropyl α- and β-hydroxyphosphonates by hydrolases in t-butyl methyl ether with isopropenyl acetate as acyl donor is limited by the narrow substrate specificity of the enzymes. High enantiomeric excesses (up to 99%) were obtained for the acetates of (S)-diisopropyl 1-hydroxy-(2-thienyl)methyl-, 1-hydroxyethyl- and 1-hydroxyhexylphosphonate and (R)-diisopropyl 2-hydroxypropylphosphonate
Abstract 2-Thienyl-phosphonylcarbinols in acidic medium gave with alcohols and aromatic derivatives two classes of new compounds depending on the reaction temperature.
摘要 2-噻吩基-膦酰基甲醇在酸性介质中与醇类和芳香族衍生物根据反应温度的不同得到两类新化合物。
An organocatalyzed facile and rapid access to α-hydroxy and α-amino phosphonates under conventional/ultrasound technique
作者:Pravin V. Shinde、Amol H. Kategaonkar、Bapurao B. Shingate、Murlidhar S. Shingare
DOI:10.1016/j.tetlet.2011.03.138
日期:2011.6
irradiation for the rapid synthesis of α-hydroxy and α-amino phosphonates under solvent-free conditions is demonstrated. Use of a novel catalyst (i.e., camphor sulfonic acid) in combination with ultrasound technique is reported for the first time. Comparative study for the synthesis of α-hydroxy and α-amino phosphonates using conventional as well as ultrasonication method is discussed.
MgO-coated-Fe3O4 nanoparticles as a magnetically recoverable and reusable catalyst for the synthesis of 1-hydroxyphosphonates
作者:Babak Kaboudin、Foad Kazemi、Fereshteh Habibi
DOI:10.1007/s13738-014-0504-9
日期:2015.3
Nanosize magnetic particles coated with magnesium oxide (core/shell nanoparticles) have been prepared and used for the synthesis of 1-hydroxyalkyl phosphonates. Catalytic activity studies show that the magnetic particles coated with magnesium oxide have highly catalytic activity toward the phosphorylation of aldehydes for the synthesis of 1-hydroxyalkyl phosphonates under solvent-free conditions. Reusability of the prepared magnetic nanoparticles was successfully examined five times with a very slight loss of catalytic activity.
Iodine-Catalyzed, Efficient Synthesis of α-Hydroxy Phosphonates in Water
作者:Hong-She Wang、Jun-E Zeng
DOI:10.1080/10426500903061541
日期:2010.6.30
An efficient and simple synthesis of α-hydroxy phosphonates from aldehydes and triethylphosphite in the presence of iodine in water has been developed. Environmentally benign reaction conditions, high yield, and easily available catalyst are important features of this method. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon