名称:
Organo‐Substituted 1,2‐Dihydro‐1,2,5‐Disilaborepines
摘要:
Abstract1,2‐Di‐1‐propynyl‐tetramethyldisilan (1) reacts with triorganoboranes R3B [R = Et (2a), CH2Ph (2c), 2‐thienyl (2d)], 9‐ethyl‐9‐borabicyclo[3.3.1]nonane (3), and diethyl(N‐pyrrolyl)borane (4) by twofold 1,1‐organoboration to give selectively the respective organo‐substituted 1,2‐dihydro‐1,2,5‐disilaborepines 5a‐d,6, and 7 in high yields. The compounds 5–7 were characterized by 1H‐, 11B‐, 13C‐, and 29Si‐NMR spectroscopy in solution. The molecular structures of the distance 1 and of the heterocycle 5c were determined by X‐ray structure analysis.