Ni cyanide and phase transfer-catalyzed carbonylation of PhCH:CBrCH:CH2 gave methylene-α-keto lactone I in good yield; isomerization to a keto butenolide (II) occurs on silica gel. The Ni catalyst was generated by treatment of Ni(CN)2.4H2O with CO and cetyltrimethylammonium bromide in NaOH and PhMe.
Novel nickel catalyzed conversion of 2-bromo-1-phenyl-1,3-butadiene to an α-keto lactone. An example of double carbonylation of a halodiene
VASAPOLLO, Giuseppe
1989-01-01
Abstract
Ni cyanide and phase transfer-catalyzed carbonylation of PhCH:CBrCH:CH2 gave methylene-α-keto lactone I in good yield; isomerization to a keto butenolide (II) occurs on silica gel. The Ni catalyst was generated by treatment of Ni(CN)2.4H2O with CO and cetyltrimethylammonium bromide in NaOH and PhMe.File in questo prodotto:
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