The preparation of highly congested β-diketones often involves the design of ligands with appropriately positioned bulky groups. These ligands can be coordinated to metal ions, such as copper(II), and then subjected to free radical conditions to generate the desired β-diketones. The choice of ligand and reaction conditions can be crucial in achieving the desired level of steric congestion.
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3,5-heptanedione, 2,2,6,6-tetramethyl-4-tricyclo[3.3.1.1~3,7~]dec-1-yl-
(2S,3S)-2-Isopropyl-3-(4-methoxy-benzylamino)-5-trimethylsilanyl-pent-4-ynethioic acid S-tert-butyl ester
1,2-bis(5-bromo-1-dodecyl-1H-1,2,3-triazol-4-yl)benzene
(+/-)-3,7-bis(4-methoxybenzyl)bicyclo[3.3.1]nona-2,6-diene
3
