Journal
ORGANOMETALLICS
Volume 19, Issue 13, Pages 2541-2545Publisher
AMER CHEMICAL SOC
DOI: 10.1021/om000251g
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Reaction of dimethyl diallylmalonate (1) with a stoichiometric amount of water and HSiEt3 catalyzed by a 1:1 mixture of (N-N)Pd(Me)Cl [N-N = 4,4'-dibenzyl-4,5,4',5'-tetrahydro-2,2'-bisoxazoline] (4a) and NaBAr4 [Ar = 3,5-C6H3(CF3)(2)] at 50 degrees C in 1,2-dichloroethane led to the isolation of a 4.4:1 mixture of trans-dimethyl-3,4-dimethylcyclopentane-1,1-dicarboxylate (5) (greater than or equal to 95% de, 38% ee) and dimethyl dipropylmalonate (6) in 88% combined yield. Reaction of 1 with a stoichiometric mixture of D2O/HSiEt3 or H2O/DSiEt3 catalyzed by 4a/NaBAr4 formed predominantly the 5-d(1) isotopomer, which possessed a single deuterium atom at one of the exocyclic methyl groups. Reaction of 1 with a stoichiometric mixture of D2O/ DSiEt3 catalyzed by 4a/NaBAr4 formed predominantly the 5-d(2) isotopomer with a single deuterium atom at each of the exocyclic methyl groups.
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