Chemistry Letters, Vol.31, No.7, 708-709, 2002
Copper-mediated coupling reaction of kinetically stabilized 1-methyl-2-phosphaethenyllithiums involving an isomerization to a 3-phospha-2-propenyllithium derivative
Copper- mediated coupling reaction of 1-methyl-2-(2,4,6-tri-t-butylphenyl)-2-phosphaethenyllithiums afforded 1,4-diphpo-sphabuta- 1,3-diene or 1,6-diphosphahexa- 1,5-diene derivatives, depending upon non-coordinated or coordinated to W(CO)5 which facilitates an isomerization to a 3-phospha-2-propenyl-lithium.