TY - JOUR
T1 - From Azole—Borane Adducts to Azaboles — Molecular Structure of an Imidazabole
AU - Padilla‐Martinez, Itzia I.
AU - Rosalez‐Hoz, Maria De Jesus
AU - Contreras, Rosalinda
AU - Kerschl, Susanna
AU - Wrackmeyer, Bernd
PY - 1994/2
Y1 - 1994/2
N2 - Elimination of H2 from the imidazole—borane adduct 1 leads to a mixture of the imidazaboles 2 and 2′. The symmetrical isomer 2 (two H2BNC fragments) is isolated in pure state and characterized by an X‐ray structure analysis (monoclinic, space group P21). 2‐(Trimethylstannyl)thiazole (3a) and 1‐methyl‐5‐(trimethylstannyl)‐1,2,4‐triazole (3b) react with triethylborane to form adducts 4 from which, in the presence of an excess of Et3B, tetraalkyltin is elimated to give the thiazabole 5a and the triazabole 5b, respectively. Multinuclear 1H‐, 11B‐, 13C‐, 14N‐, and 119Sn‐NMR spectroscopy serve for following the reactions (compounds 3 to 5) and to characterize all final products.
AB - Elimination of H2 from the imidazole—borane adduct 1 leads to a mixture of the imidazaboles 2 and 2′. The symmetrical isomer 2 (two H2BNC fragments) is isolated in pure state and characterized by an X‐ray structure analysis (monoclinic, space group P21). 2‐(Trimethylstannyl)thiazole (3a) and 1‐methyl‐5‐(trimethylstannyl)‐1,2,4‐triazole (3b) react with triethylborane to form adducts 4 from which, in the presence of an excess of Et3B, tetraalkyltin is elimated to give the thiazabole 5a and the triazabole 5b, respectively. Multinuclear 1H‐, 11B‐, 13C‐, 14N‐, and 119Sn‐NMR spectroscopy serve for following the reactions (compounds 3 to 5) and to characterize all final products.
KW - Azaboles
KW - Azole‐borane adducts
KW - Imidazabole
KW - NMR, multinuclear
KW - X‐ray analysis
UR - http://www.scopus.com/inward/record.url?scp=84989462356&partnerID=8YFLogxK
U2 - 10.1002/cber.19941270210
DO - 10.1002/cber.19941270210
M3 - Artículo
SN - 0009-2940
VL - 127
SP - 343
EP - 346
JO - Chemische Berichte
JF - Chemische Berichte
IS - 2
ER -