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2004
Cleavage reactions
O 0100
Catalytic Deallylation of Allyl- and Diallylmalonates. — A new, mild method for
deallylation of 2-substituted-2-allylmalonates to 2-substituted malonates via
49- 042 smooth
selective C—C bond cleavage is reported. A comparison of several group VIII transition-metal phosphine complexes indicates that the use of a Ni complex affords best results. The yields of the deallylation are in the range of 60 and 99%. This smooth deallylation method offers an opportunity to use the allyl group as an effective protecting
group for acidic hydrogen of malonic esters. — (NECAS, D.; TURSKY, M.;
KOTORA*, M.; J. Am. Chem. Soc. 126 (2004) 33, 10222-10223; Dep. Org. Nucl.
Chem., Charles Univ., CZ-128 40 Prague 2, Czech Republic; Eng.) — Bartels
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