With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.872-32-2,2-Methyl-1-pyrroline,as a common compound, the synthetic route is as follows.
872-32-2, 5-Methyl-3,4-dihydro-2H-pyrrole (1.00 g, 12.0 mmol) was dissolved in carbon tetrachloride. To the solution was added NCS (12.85 g, 96 mmol) as a solid and reaction mixture heated to 85 0C and stirred overnight. The mixture was cooled to 0 0C and the precipitate filtered off and the solvent evaporated. The residue was dissolved in methanol and sodium methoxide (3.90 g, 72.2 mmol) was added. The resulting suspension was heated to reflux and stirred for 3 h. The methanol was evaporated and the residue suspended in Et20. The solid was filtered off and the ether evaporated. The residue was dissolved in DCM and 2M HCI was added. The biphasic solution was stirred until no SM remained. The phases were separated and the organic layer was dried over MgSO4 and evaporated to an orange oil. The crude oil was adsorbed onto silica and run on 40 g of silica with EtOAc and Hexanes to afford the title compound as an orange solid (0.2958 g, 1.854 mmol, 15.41 percent yield). 1H NMR (400 MHz, CDCI3): delta ppm 9.54 (br. s., 1 H), 6.80 (s., 1 H), 6.17 (s., 1 H), 3.83 (s, 3 H). MS: m/z 160.0 (M+1 ).
As the paragraph descriping shows that 872-32-2 is playing an increasingly important role.
Reference£º
Patent; SMITHKLINE BEECHAM CORPORATION; WO2008/154271; (2008); A1;,
Pyrroline – Wikipedia
1-Pyrroline | C4H7N – PubChem