METHOD OF PREPARING 4,5-DIALKYL (PHENYL) 1 Russian patent published in 2000 - IPC

4Z, 9- DECATREENES. FIELD: petrochemical synthesis. SUBSTANCE: method comprises reacting disubstituted acetylene of general formula R-≡-R,, wherein R is as defined in claim 1, with triethyl aluminium (ALEt₃) at molar ratio of reactants of 10:(10-12), respectively in the presence of zirconacene dichloride in amount of 1-4 mole % with respect to acetylene. Process is carried out in argon atmosphere under normal conditions and reaction mixture is stirred for 8 hours and BuLi is added in equimolar amount with respect to triethyl aluminium followed by addition of copper monoiodide at about 0 C in amount of 1-3 mole % with respect to original disubstituted acetylene, and allyl chloride in three-fold excessive amount with respect to triethyl aluminium, and mixture is thereafter is stirred at normal temperature for 7-9 hours. EFFECT: high regio- and stereoselectivity of the method under milder reaction conditions. 11 ex, 1 tbl