Methyl acetoacetate → HCID 54682266, compound

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Reaction Steps

The title compound was prepared as described in General Methods 6 and 7 using 2.5 mL (23.2 mmol) of methyl acetoacetate, 0.96 g (24 mmol) of 60% sodium hydride, 15 mL (24 mmol) of 1.6M n-butyllithium, 4.5 g (11.7 mmol) of 1-{4-[2-(tert-butyl-dimethyl-silanyloxy)-ethoxyl -phenyl}-3-phenyl-propan-1-one from Example O and 100 mL of THF. Purification by silica gel chromatography, eluting with EtOAc:hexane (25:75 to 50:50) gave the title compound. 1H NMR (CDCl3) δ 0.0 (s, 6 H), 0.81 (s, 9 H), 2.17 (m, 2 H), 2.42 (m, 1 H), 2.63 (m, 1 H), 2.85 (dd, 2 H), 3.22 (dd, 2 H), 3.86-3.96 (m, 4 H), 6.80-7.19 (m, 9 H).

Provenance & Evidence