32798-56-4Relevant academic research and scientific papers
Synthesis of tetraarylborates via tetralithio intermediates and the effect of polar functional groups and cations on their crystal structures
Tomaszewski, Patryk,Wiszniewski, Marcin,Serwatowski, Janusz,Wo?niak, Krzysztof,Durka, Krzysztof,Luliński, Sergiusz
, p. 16627 - 16637 (2018)
A novel general protocol for the preparation of functionalized (COOH, CHO, C(O)NHtBu, B(OH)2) tetraphenyl- and tetrakis(4′-biphenylyl)borates is reported. It involves four-fold halogen-lithium exchange in potassium tetrakis(iodophenyl)borates and tetrakis(4′-bromobiphenylyl)borate) using t-BuLi in THF at ?78 °C followed by treatment of the resulting tetralithio intermediates with electrophiles (CO2, DMF, t-BuNCO, B(OMe)3). X-ray crystal structures of ammonium tetrakis[4-(dihydroxyboryl)phenyl]borate, lithium tetrakis(3-carboxyphenyl)borate, and lithium tetrakis[4-(tert-butylcarbamoyl)phenyl]borate were determined showing a strong effect of the cation and polar functional group on supramolecular architecture.
