GB792537A - Vinylic magnesium chloride complexes and method of making same - Google Patents

Abstract

The invention comprises vinylic magnesium chloride complexes of formula ViMgCl.nQ, wherein Vi is a substituted or unsubstituted vinylic radical having a carbon atom capable of being bound to magnesium and containing no functional group which is reactive under the conditions for forming the complex, n is an indeterminate small number of the order of 1 to 3, and Q is a substituted or unsubstituted cyclic ether containing no substituent reactive under the conditions for forming the complex, having 5 or 6 atoms in the ring, only one being oxygen, the others being carbon except that a substituted nitrogen atom may replace the 4-carbon when the ring has 6 atoms, the ring containing not more than one double bond and at least one ring carbon atom adjacent the oxygen being free of substituents. In addition to tetrahydrofuran, tetrahydropyran and 2-methyl tetrahydrofuran which are specified in the parent Specification, Q may also represent dihydropyran, 2-ethoxytetrahydrofuran, tetrahydrofurfuryl ether and N-methylmorpholine. The invention of the parent patent may be further modified in that in the grouping R11(R1)C= C(R)-(which is represented above by "Vi") the substituents R and R1 may be joined to form a ring as in 1-chlorocyclohexene-1. The complexes may be prepared by (a) dissolving the vinylic chloride in the compound Q and adding the mixture to the magnesium, activated, if necessary, or (b) dissolving a small amount of the vinylic chloride in the compound Q, reacting this mixture with the magnesium and adding the remainder of the vinylic chloride after reaction has commenced. The examples describe the preparation of the tetrahydrofuran complexes of 2-propenyl magnesium chloride, 1-propenyl magnesium chloride, 4-methyl-2-penten-2-yl magnesium chloride, 2-buten-2-yl magnesium chloride, 1-buten-1-yl magnesium chloride, 1-cyclohexen-1-yl magnesium chloride, vinyl magnesium chloride, and of b -phenylvinylmagnesium chloride tetrahydropyran, a -phenylvinyl-magnesium chloride 2-methyl-tetrahydrofuran, a - methyl - b - phenylvinyl - magnesium chloride tetrahydrofurfuryl ether, octadecen-1-yl-2 magnesium chloride 2-ethoxytetrahydropyran, 1-octadecen-1-yl magnesium chloride dihydropyran and vinyl magnesium chloride N-methyl morpholine. The complexes of the parent Specification are disclaimed.