Nitration of Strongly Deactivated Aromatics with Superacidic Mixed Nitric-Triflatoboric Acid (HNO3/2CF3SO3H-B(O3SCF3)3)
摘要:
The nitration of various deactivated arenes (including methanesulfonyl-, nitro-, and polyhalobenzenes) was carried out in good yield with mixed nitric-triflatoboric superacid. For example pentafluorobenzene gave pentafluoronitrobenzene in 99% yield, nitrobenzene to m-dinitrobenzene in 92% selectivity with 85% overall yield, and methyl phenyl sulfone gave only the m-nitro isomer in 78% isolated yield. Thus the new nitrating system gives high regioselectivity and yields under generally mild reaction conditions. The reagent system is compatible with many functional groups of arenes.
Olah; Orlinkov; Oxyzoglou, Russian Journal of Organic Chemistry, 1998, vol. 34, # 11, p. 1573 - 1578
作者:Olah、Orlinkov、Oxyzoglou、Prakash, G.K. Suria
DOI:——
日期:——
Nitration of Strongly Deactivated Aromatics with Superacidic Mixed Nitric-Triflatoboric Acid (HNO3/2CF3SO3H-B(O3SCF3)3)
作者:George A. Olah、Alexander Orlinkov、Alexandros B. Oxyzoglou、G. K. Surya Prakash
DOI:10.1021/jo00127a048
日期:1995.11
The nitration of various deactivated arenes (including methanesulfonyl-, nitro-, and polyhalobenzenes) was carried out in good yield with mixed nitric-triflatoboric superacid. For example pentafluorobenzene gave pentafluoronitrobenzene in 99% yield, nitrobenzene to m-dinitrobenzene in 92% selectivity with 85% overall yield, and methyl phenyl sulfone gave only the m-nitro isomer in 78% isolated yield. Thus the new nitrating system gives high regioselectivity and yields under generally mild reaction conditions. The reagent system is compatible with many functional groups of arenes.