A New Protocol for a One-pot Synthesis of α-Amino Phosphonates by Reaction of Imines Prepared In Situ with Trialkylphosphites
作者:Mohammad R. Saidi、Najmedin Azizi
DOI:10.1055/s-2002-32957
日期:——
Imines prepared in situ by reaction of aldehydes and ketones with primary amines in ethereal solution of LiClO4 react readily at ambient temperature with trialkylphosphite to give high yields of α-amino phosphonates.
Zirconium(IV) Compounds As Efficient Catalysts for Synthesis of α-Aminophosphonates
作者:Srikant Bhagat、Asit K. Chakraborti
DOI:10.1021/jo8009006
日期:2008.8.1
Zirconium(IV) compounds are reported as excellent catalysts for a three-component one-pot reaction of an amine, an aldehyde or a ketone, and a di/trialkyl/aryl phosphite to form α-aminophosphonates under solvent-free conditions at rt. Among the various zirconiumcompounds, ZrOCl2·8H2O and ZrO(ClO4)2·6H2O were most effective. The reactions were faster with dialkyl/diaryl phosphites than with trialkyl/triaryl
An Extremely Efficient Three-Component Reaction of Aldehydes/Ketones, Amines, and Phosphites (Kabachnik−Fields Reaction) for the Synthesis of α-Aminophosphonates Catalyzed by Magnesium Perchlorate
作者:Srikant Bhagat、Asit K. Chakraborti
DOI:10.1021/jo062140i
日期:2007.2.1
an extremely efficient catalyst for the synthesis of α-aminophosphonates. A three-component reaction (3-CR) of an amine, an aldehyde or a ketone, and a di-/trialkyl phosphite (Kabachnik−Fields reaction) took place in one pot under solvent-free conditions to afford the corresponding α-aminophosphonates in high yields and short times. The use of solvent retards the rate of the reaction and requires a
Organocatalytic Synthesis of α-Aminophosphonates Using o-Benzenedisul fonimide as a Recyclable Bronsted Acid Catalyst
作者:Nasrin Farahani、Jafar Akbari
DOI:10.2174/1570178614666170321123731
日期:2017.7.19
Background: One-Pot three component preparation of α-aminophosphonates in the presence
of o-benzenedisulfonimide as efficient acidic organocatalyst has been described. The catalyst can be
recovered for further reactions and reused without any loss of efficiency.
Methods: A very simple protocol was followed in the reaction process. Initially, we attempted a three
component coupling of benzaldehyde with aniline and trimethylphosphite using o-benzenedisulfonimide
(5 mol%). The reaction proceeded smoothly at r.t under solvent free conditions and the desired product.
Results: The reactions worked well with almost all the aldehydes, heteroaryl aldehydes and ketones; at
the end of the reaction, the product could be separated by usual work up. Finally, the water tolerant
catalyst may be recycled from water, because of its good solubility in water.
Conclusion: The catalyst is a safe, nonvolatile, and noncorrosive Brønsted acid; it is readily recovered
at the end of the reactions simply by evaporating the aqueous washings. The products are generally obtained
in good yields and short time under simple and mild reaction conditions.
Trifluoroethanol as a metal-free, homogeneous and recyclable medium for the efficient one-pot synthesis of α-amino nitriles and α-amino phosphonates
作者:Akbar Heydari、Samad Khaksar、Mahmood Tajbakhsh
DOI:10.1016/j.tetlet.2008.10.106
日期:2009.1
Trifluoroethanol is found to be an efficient and recyclable medium in promoting one-pot, three-component coupling reactions of aldehydes or ketones, amines and trimethylsilyl cyanide or trimethylphosphite to afford the corresponding α-amino nitriles or α-amino phosphonates in high yields. This protocol does not require the use of an acid or base catalyst.