Synthesis and structural characterization of an azatitanacyclobutene: the key intermediate in the catalytic anti-Markovnikov addition of primary amines to α-alkynes†
Abstract
Reaction of the imidotitanium complexes [Ti(NtBu)(N2Npy)(py)]
(1) and [Ti(N-2,6-C6H3iPr2)(N2Npy)(py)]
(2) with CR}]
(R = Ph: 3, Tol: 4) and [Ti(N2Npy){κ2-N(2,6-C6H3iPr2)CH
CR}]
(R = Ph: 5, Tol: 6). Complex 6 is the first example of a key intermediate in the anti-Markovnikov addition of a