2-Naphthalenecarboxaldehyde, 3-ethyl-5,6,7,8-tetrahydro-5,5,8,8-tetramethyl- → (3-Ethyl-5,6,7,8-tetrahydro-5,5,8,8-tetramethylnaphth-2-yl)-(4-tolyl)-acetylene

Participants

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, 24.4 g (0.1 mole) of 3-ethyl-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 8.3 g (25%) of the title compound of melting point 72°-73° C., the reaction mixture being poured onto water and acidified, and the precipitate which had separated out being recrystallized from methanol and once again from isopropanol.

Provenance & Evidence