Borane complexes of phosphorus compounds, a very common oxidation-free relay for catalytic ligands (phosphines, phosphites, and phosphinites), can be easily deprotected by treatment with polymer-supported piperazine or N-methylpiperazine. Deprotection conditions have been optimized for the different types of phosphorus compounds, and the resulting solutions can be used without any intermediate work-up or purification process.
![Work-up-free deprotection of borane complexes of phosphines, phosphites, and phosphinites with polymer-supported amines](https://www.iciq.org/wp-content/uploads/2014/03/Work-up-free-deprotection_eng_noticies_articles_2006_10.gif)