Dedicated to Professor Bogdan Boduszek on the occasion of his 67th birthday
Abstract
Due to the interest in α-amino- and α-hydroxyphosphonates and their derivatives, which
arises from the important biological activity exhibited by those compounds, the development
of efficient protocols for their preparation is of great importance. In the last 10
years however, the chemistry of α-amino and α-hydroxyphosphonates has been witness
to an explosion of research activities in the field of application of environmentally
benign media. This fact can be partially attributed to the development of the field
of green and sustainable chemistry and especially the implementation of green solvents
that has a large potential to contribute to more sustainable processes in chemical,
pharmaceutical and processing industries. This review provides the reader with an
in-depth overview of advances in the synthesis of α-amino- and α-hydroxyphosphonates
under eco-friendy conditions compiled into sections with respect to product type and
reaction medium.
1 Introduction
2 Syntheses of α-Aminophosphonates in Environmentally Friendly Media
2.1 Reactions in Water
2.2 Reactions in Ionic Liquids
2.3 Solvent-Free Protocols
2.3.1 Reactions without Any Additives
2.3.2 Reactions Promoted by Ultrasound or Microwave Irradiation
2.3.3 Catalyzed Reactions under Solvent-Free Conditions
3 Preparation of α-Hydroxyphosphonates under Environmentally Friendly Conditions
3.1 Reactions in Water
3.2 Reactions under Solvent-Free Conditions
4 Concluding Remarks
Key words phosphorylation - Schiff bases - ionic liquids - imines - green chemistry - phosphonic
acid diesters - trialkyl phosphite