Citation:
LIU Shangchun, HUANG Yawen, YANG Junxiao, ZHU Fanghua, LI Bo, ZHANG Lin. New Route to Synthesis of 1,2-Diaryl Ethylene Derivatives by Heck Reaction[J]. Chinese Journal of Applied Chemistry,
;2011, 28(5): 526-530.
doi:
10.3724/SP.J.1095.2011.00391
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Heck reaction was employed to synthesize stilbene derivatives by utilizing 1,3-divinyl-1,1,3,3-tetramethyldisiloxane(DVS) as the ethylene source.The effects of the starting material molar ratio,reaction temperature and reaction time on the yield were investigated.A possible reaction mechanism was proposed.The results show that in DMF/H2O at 120℃,with the starting material molar ratio of R-Br:DVS at 5:1,and reaction time=48 h,the reaction produces 4-vinyl-bis-benzocyclobutene(V-bisBCB) and 1,2-diphenylethene(V-bisPh) with a yield of 45.1% and 48.6%,respectively.
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