Methyl acetoacetate → 4-Hydroxy-6,6-bis-[2-(4-hydroxy-3-methoxy-phenyl)-ethyl]-5,6-dihydro-pyran-2-one

Participants

Reaction Steps

The title compound was prepared as described in General Method 6 using 3.72 g (7.3 mmol) of 1,5-bis-(4-benzyloxy-3-methoxy-phenyl)-pentan-3-one (prepared in Example I), 0.32 g (8.0 mmol) of 60% NaH dispersion in mineral oil, 0.85 g (7.3 mmol) of methyl acetoacetate, 5.0 mL (1.6 M, 8.0 mmol) of n-butyllithium and 100 mL of THF. The reaction mixture was stirred for 12 hours at room temperature and worked up in the usual manner.

Provenance & Evidence