1-(Trimethylsilyl)-1H-benzotriazole

Nickel-catalyzed cross-coupling of N-acyl benzotriazoles with oxiranes and oxetanes for the synthesis of β-haloethyl and γ-halopropyl esters

“…Driven by the favourable binding enthalpy of Si–N, 17 a σ-bond metathesis took place via a four-membered ring transition state ( B ) to form intermediate C and 1-(trimethylsilyl)-1 H -benzotriazole ( D ). 18 Finally, C underwent reductive elimination to release the β-chloro esters ( 3 ) and regenerated Ni(0).…”