Synthesis of unsymmetrical cage phosphonates from heterocyclic systems based on 2H-1,2-benzoxaphosphinine. - Sadykova, Yulia M.; Zalaltdinova, Alena V.; Smailov, Atabek K.; Trofimova, Larisa M.; Voronina, Julia K.; Burilov, Alexander R.; Pudovik, Mikhail A. (Chemistry of Heterocyclic Compounds, 2020)