ETHYL 5-(3,4-DICHLOROPHENYL)-5-OXOVALERATE synthesis

Yield:342636-46-8 47%

Steps:

XVIII Ethyl 3,4-Dichloro-δ-oxobenzenepentanoate

PREPARATION XVIII Ethyl 3,4-Dichloro-δ-oxobenzenepentanoate The expected product is obtained in the form of a brown oil (yield=47%) by following a procedure analogous to Preparation VII and starting from 3,4-dichloro-δ-oxobenzenepentanoic acid. NMR (300 MHz, CDCl₃) δ: 8.05 (d, J=1.5 Hz, 1H); 7.80 (dd, J=1.5 Hz, J=8.1 Hz, 1H); 7.56 (d, J=8.1 Hz, 1H); 4.13 (q, J=7.4 Hz, 2H); 3.02 (t, J=6.6 Hz, 2H); 2.42 (t, J=6.6 Hz, 2H); 2.05 (quint, J=6.6 Hz, 2H); 1.25 (t, J=7.4 Hz, 3H).

References:

US6605633,2003,B1