Reaktion #6074

Reaktionsgleichung

5-bromo-2,4-dinitrotoluene

pyrrolidine

→

17

2,4-Dinitro-5-N-pyrrolidinotoluene

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturwas heated at 90°-100° C. for 2 hours
2. 2
   Filtrationthe precipitated solids filtered off
3. 3
   Waschenwashed with water, and vacuum
4. 4
   Sonstigedried
5. 5
   SonstigePurification
6. 6
   SonstigeEvaporation of the eluants

Vorschrift

A mixture of 5-bromo-2,4-dinitrotoluene (2.61 g, 10 mmol) and pyrrolidine (2.49 g, 35 mmol) was heated at 90°-100° C. for 2 hours. The resulting dark brown oil was combined with cracked ice and the precipitated solids filtered off, washed with water, and vacuum dried. Purification was carried out by flash chromatography of the solids on a silica gel column using chloroform/hexane (50:50) as eluant. Evaporation of the eluants afforded 17 as orange needles: 2.0 g (82%) yield; mp 142° C.; TLC (chloroform), Rf =0.82; IR (KBr pellet) 1606, 1566, 1510, 1369, 1350, 1334, 1301, 1276, 1130, 833 cm-1 ; 1H NMR (dimethyl sulfoxide-d6) δ8.83 and 8 53 (2H, 2×s, aromatic protons), 3.27 (4H, m, methylenes adjacent to pyrrolidine N), 2.61 (3H, s, methyl), 1.99 (4H, m, other pyrrolidine methylenes); mass spectrum (EI mode) m/z 251 (P+), 234 (P+ -OH). Anal. Calcd for C11H13N3O4 : C, 52.58; H, 5.21; N, 16.72. Found: C, 52.51; H, 5 27; N, 16.64.

Quelle