Diethyl [chloro(4-methylphenyl)methyl]phosphonate → (3-Fluoro-5,6,7,8-tetrahydro-5,5,8,8-tetramethylnaphth-2-yl)-(4-tolyl)-acetylene

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Reaction Steps

Using a process similar to that described in Example 13, 27.7 g (0.1 mole) of diethyl 1-chloro-1-(4-tolyl)-methylphosphonate, 23.4 g (0.1 mole) of 3-fluoro-2-formyl-5,6,7,8-tetrahydro-5,5,8,8-tetramethylnaphthalene and 22.5 g (0.2 mole) of potassium tert.-butylate were reacted for 1 hour to give the title compound. Recrystallization from isopropanol gave 16.4 g (51%) of product of melting point 60°-61° C.

Provenance & Evidence