petasis reagent cp2TiMe2

titanocene dichloride 1 eq.
meli 2 eq. (can use excess)
-5 C, meli in Et2O was added dropwise into titanocene dichloride in toluene (0.1-0.2 M) during 10 min.
upon addition, red insoluable TiCP2Cl2 disappeared slowly.
an intermediate TiCp2ClMe is soluable and red colored.
the product ticp2me2 is also soluable but orange colored.

although standard prodcedure require 2 eq. of meli. I found out excee meli won't affect anything.

quench the rxn by nh4Cl solution;, then extract with Et2O. dried over mgso4 and concentrated to 0.5M (toluene). stored in freezer.