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1,2‐Bis(diisopropylamino)‐1,2‐dihydro‐1,2‐benzodiboret ‐ ein erstes thermisch stabiles 1,2‐Dihydro‐1,2‐diboret
Author(s) -
Kaufmann Dieter E.,
Boese Roland,
Scheer Alexander
Publication year - 1994
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.1491271138
Subject(s) - chemistry , medicinal chemistry , trimethylsilyl , yield (engineering) , benzene , sodium , potassium , catalysis , palladium , polymer chemistry , stereochemistry , organic chemistry , materials science , metallurgy
1,2‐Bis(diisopropylamino)‐1,2‐dihydro‐1,2‐benzodiborete ‐ A First Thermally Stable 1,2‐Dihydro‐1,2‐diborete * The synthesis of 1,2‐bis(diisopropylamino)‐1,2‐dihydro‐1,2‐benzodiborete ( 7 ) suceeds in good yield by a twofold ipso ‐borylation of 1,2‐bis(trimethylsilyl)benzene to give 3 , double amination to afford 4 and subsequent coupling with sodium/potassium alloy. Crystalline 7 is thermally stable; an X‐ray crystallographic structure determination has been carried out. In concentrated solution reaction of 4 with sodium/potassium alloy predominantly leads to the formation of the tetraborocine 6 by dimerization. In the presence of (phthalocyaninato)palladium as catalyst 7 reacts with 2 equivalents of dimethylacetylenedicarboxylate to give the benzo‐annulated diborocine 12.