160318-67-2Relevant academic research and scientific papers
Synthesis of C-substituted 2,5-Dihydro-1H-boroles (3-Borolenes)
Herberich, Gerhard E.,Marx, Hans-W.,Wagner, Trixie
, p. 2135 - 2140 (2007/10/02)
Magnesium-diene addition compounds derived from isoprene, 2,3-dimethylbutadiene, and 1,2-dimethylenecyclohexane are treated with boron halides BCl2(NR2) (R = Me, Et, iPr), PhBCl2, or MeBBr2 to give C-substituted 2,5-dihydro-1H-boroles (3-borolenes) 3-5.In a new in situ procedure 1,3-pentadiene reacts with Mg/BCl2(NR2) in THF to yield 2-methyl derivatives 2-MeC4H5BNR2 (2).The NMe3 adduct of 4,5,6,7-tetrahydro-2-methyl-2-boraindan 5e*NMe3 undergoes a topomerization with ΔG290(excit.) = 59 +/- 2 kJ/mol in a dissociative-associative process.The crystal structure of 3,4-dimethyl- 1-phenyl-3-borolene (4d) has been determined.The molecule displays a classical planar structure.There are no indications for specific intermolecular interactions. - Key Words: 1H-Boroles, 2,5-dihydro / 3-Borolenes / 2-Boraindan, 4,5,6,7-tetrahydro-
