With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.123770-62-7,Ethyl 5-(hydroxymethyl)isoxazole-3-carboxylate,as a common compound, the synthetic route is as follows.
0.172 g (1.00 mmole) of ethyl 5-hydroxymethyl-isoxazole-3-carboxylate and 0.33 ml (1.92 mmoles) of N,N-diisopropylethylamine are dissolved in 9 ml of 1,2-dichloroethane then cooled to 0 C. 0.184 g (0.91 mmole) of p-nitrophenyl chloroformate in solution in 2 ml of 1,2-dichloromethane are added. The mixture is stirred for 20 mins at ambient temperature, then 0.230 g (0.91 mmole) of 2-(4-chlorophenoxy)-7-aza-spiro[3.5]-nonane, obtained in stage 2.2, is added. The mixture is heated at 60 C. for 15 hrs. After return to ambient temperature, a 1N aqueous solution of caustic soda is added, and the product is extracted with dichloromethane. The combined organic phases are then successively washed three times with a 1N aqueous solution of caustic soda, twice with a saturated aqueous solution of ammonium chloride and once with a saturated aqueous solution of sodium chloride, dried over sodium sulphate, filtered and evaporated to dryness. 0.447 g of the expected product are obtained in the form of a colourless oil which is used as such in the following stage., 123770-62-7
The synthetic route of 123770-62-7 has been constantly updated, and we look forward to future research findings.
Reference£º
Patent; SANOFI; US2012/129830; (2012); A1;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem