BIS-3-METHYL-2-BUTYLBORANE AS A SELECTIVE REAGENT FOR

cumene and heptane as a solvent h t t!ie end of 20 hours, only the alpha product remained (entry 1). On the other hand, when the reaction was stopped a f t e r 4 hours, not only alpha product, but rnrta a$ TABLE11 REAC I O~ Y

OF

HIGHLYPURIFIED

P-CHLOROCUMETF I\ ITH

POTASSIL \I 5 ,l\ent

1 2

"

Curneiie Curnene

Reartioo time hr