Method for Reducing Alkyne Compuonds

摘要

The present invention relates to a method for preparing cyclohexene derivatives of the general formulae I or II by reducing alkyne compounds of the general formulae III or IV with a mixture of zinc and at least one ammonium salt of the formula V as reducing agent, in which the substituents R¹ to R⁸ have independently of one another the meaning specified in the description, wherein the reducing agent comprises from 0.3 to 0.49 mol of at least one ammonium salt of the formula V per mol of zinc.