Trisheteroarylation of aminodichloroboranes is considered a new type of nucleophilic reaction based on symbiotic effect. Such reactions between N-Substituted aminodichloroboranes and some heteroaryllithium (2-furyl-, 2-benzofuryl-, 2-benzothiazolyl-, 5-methyl-2 -furyl-lithium) yield the corresponding tetrahedral aminotrisheteroarylborate complexes, which were converted into trisheteroarylboranes or their adducts with secondary amine as well as outside Lewis base after hydrolysis. The influences of softer nucleophiles in their borate anion formation processes were discused and showed that the reaction mechanism involves the symbiotic stabilization of aminotriorganylborate anion.

Key words: NUCLEOPHILIC REACTION, BORANE, ARYL LITHIUM, BORON COMPLEX