ChemInform Abstract: Halogen‐Promoted Selective Carbonylation of Propane in Superacid Media.

Abstract

The selectivity of the carbonylation of propane (I) in superacid medium is highly enhanced by the addition of catalytic amounts of bromide (NaBr, Me4NBr, Br2).

Reversible Protonation of Isobutane in Liquid Superacids in Competition with Protolytic Ionization

“…During our studies on superacid-catalyzed alkane carbonylation related with an alternative synthesis for metacrylic ester from propane, we noticed that the reaction system could be simplified very much by using carbon monoxide as coreactant in the superacid medium. Since the early attempt of Hogeveen to carbonylate methane, reports on direct carbonylation of alkanes in superacid media include reactions of cycloalkanes, C 5 −C 8 alkanes, and adamantane .…”

Superacid‐Catalyzed Reactions

“…406 Yoneda et al 407 have also found that other alkanes can be carboxylated as well with CO in HF-SbF 5 . 409 Sommer and co-workers 410,411 have made detailed studies of the carbonylation of lower alkanes in superacidic media. Formation of the tertiary carboxylic acids in the superacid HSOF-SbF 5 was shown to be accelerated by the addition of Cu 2 O to the reaction mixture.…”