157 research outputs found
Pest insect immigration warning system by an atmospheric dispersion model, weather radars and traps
Peer reviewe
Radical functionalization of unsaturated amino acids: synthesis of side-chain-fluorinated, azido-substituted, and hydroxylated amino acids
A range of enantiomerically pure protected side-chain-fluorinated amino acids has been prepared (13 examples) by treatment of protected amino acids containing unsaturated side chains with a combination of Fe(III)/NaBH4 and Selectfluor. The modification of the conditions by replacement of Selectfluor with NaN3 allowed the preparation of side-chain azido-substituted amino acids (five examples), which upon catalytic hydrogenation gave the corresponding amines, isolated as lactams (four examples). Radical hydration of the unsaturated side chains leading to side-chain-hydroxylated protected amino acids has also been demonstrated
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