Dedicated to Prof. Dr. Michael Schmittel on the occasion of his 60th birthday
Abstract
A simple, fast and efficient synthesis of 3-phosphorylated benzoxaboroles using the
Pudovik reaction is reported. A number of diverse 3-(dialkoxyphosphoryl)-1-hydroxy-3H-2,1-benzoxaboroles were synthesised in 70–86% yield. Interesting hydrogen bond features
were observed in the crystal lattice of the 5-chlorinated 3-bis(benzyloxy)phosphoryl
derivative with both inter- and intramolecular C–H···O hydrogen bonds. Additionally,
linear chains of intermolecular O–H···O hydrogen bonds were observed.
Key words
nucleophilic addition - phosphorus - boron - antifungal agents - heterocycles