Application of 169037-23-4, A common heterocyclic compound, 169037-23-4, name is 5-(Trifluoromethoxy)indoline-2,3-dione, molecular formula is C9H4F3NO3, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.
General procedure: To a solution of isatin 1 (1 mmol) in toluene (5 mL) was added the solution of trialkyl/aryl Al 2 (2 mmol, 2 M in toluene) dropwise at RT. Then the mixture was heated at 70 C and stirred for additional 3-3.5 h (see Table 2). The reaction was monitored by TLC. After completion of the reaction, toluene was evaporated and extracted with ethyl acetate (3 × 5 mL). The combined organic layer was washed with brine solution, dried over anhydrous Na2SO4, and concentrated under reduced pressure (rotary evaporator). The crude products were purified by silica gel column chromatography using ethyl acetate/hexanes (4:1-1:1). All compounds were characterized by (MP, NMR, Mass, and IR) spectral data.18
The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.
Reference:
Article; Kumar, G. Santosh; Ramesh, Palakuri; Kumar, A. Sanjeeva; Swetha; Meshram; Tetrahedron Letters; vol. 54; 37; (2013); p. 5048 – 5051;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem