Ordered states magnetic resonances in the random mixture with competing spin anisotropies Fe1−xCoxCl2

Antiferromagnetic and ferromagnetic resonance experiments at submillimeter wavelengths have been performed on random mixtures Fe_1?xCo_xCl₂ of two metamagnets with competing orthogonal spin anisotropies. The results show clearly the competition of the anisotropies in these alloys. The anisotropy in these mixtures decreases with concentration in both the iron rich and cobalt rich regions.     

Introduction of functionalized C1, C2, and C3 units to imines through the dimethylzinc-air-initiated radical addition

Introduction of functionalized C1, C2, and C3 units to imines was achieved by using the dimethylzinc-air-initiated alpha-alkoxyalkyl radical addition as a key reaction. The addition to a C[double bond]N double bond chemoselectively occurred in the presence of a C[double bond]O double bond, which is one of the advantages of this radical addition reaction over ionic addition reactions.     

General entry to asymmetric one-pot [N + 2 + N] cyclization for the synthesis of three- to seven-membered azacycloalkanes

Enantio- and diastereoselective one-pot synthesis of three- to seven-membered cis-azaheterocycles was achieved using a triggered asymmetric conjugate addition reaction of lithium amide with an enoate, followed by alkylation of the resulting lithium enolate with α,ω-dihaloalkane and N-alkylation. Isomerization of cis-azaheterocycles with a base yielded the trans-product, constituting a one-pot synthesis of cis-azacycles and a two-step synthesis of trans-azacycles. The four-step asymmetric synthesis of nemonapride highlights the general utility of the method.