Use of crown ethers to isolate intermediates in ammonia-borane dehydrocoupling reactions

Chem Commun (Camb). 2016 Mar 4;52(18):3650-2. doi: 10.1039/c6cc00088f.

Abstract

The presence of 18-crown-6 in the Lewis acid-promoted dehydrocoupling reaction of ammonia borane permits isolation of [(THF)BH2NH3](+) and [BH2(NH3)2](+) cations. [(THF)BH2NH3](+) reacts with Lewis bases to give either boron adducts or by deprotonation at nitrogen to give borazine and ammonia-borane.

Publication types

  • Research Support, Non-U.S. Gov't