H. Hopfl et al., STUDY OF CYCLIC BORINATES OBTAINED FROM PIPERIDINE AND PIPERAZINE ALCOHOLS BY SPECTROSCOPIC METHODS AND X-RAY CRYSTALLOGRAPHY, Journal of organometallic chemistry, 553(1-2), 1998, pp. 221-239
A series of eleven new 2-aminoethyl- and 3-aminopropyl borinate deriva
tives with a coordinative N --> B bond has been synthesized by condens
ation reactions between piperidine-as well as piperazine alcohols and
diphenylborinic acid. The products obtained are analogous to N-spiro c
ompounds and bicyclic systems and have been characterized by spectrosc
opic methods and X-ray crystallography. Thereby the N --> B bond and t
he geometry of this new heterocyclic systems have been studied in more
detail. (C) 1998 Elsevier Science S.A.