29943-42-8, Dihydro-2H-pyran-4(3H)-one is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated
Step 1: Synthesis of Compound A2To a solution of 75 g (0.75 mol) of compound Al in THF (150 mL) is added a suspension of 28.4 g (0.75 mol) L1AIH4 in THF (600 mL) under nitrogen atmosphere maintaining the temperature below 30 C with the aid of an ice-bath. Then the reaction is allowed to warm to room temperature and stirred for 5 h. The reaction is quenched by addition of saturated aqueous NH4C1 solution until effervescence ceased. The resulting precipitate is removed by filtration through Celite and washed with THF (150 mL). The filtrate is concentrated under reduced pressure to afford 71.1 g of compound A2 as a pale yellow oil. Yield: 92%, ]H NMR (500 MHz, CHLOROFORM-d) delta ppm 1.54 (2 H, m, 7=13.37, 9.55, 9.55, 4.22 Hz), 1.81 – 1.92 (2 H, m), 2.11 (1 H, br. s.), 3.38 – 3.47 (2 H, m), 3.83 (1 H, tt, 7=9.10, 4.38 Hz), 3.94 (2 H, dt, 7=11.88, 4.15 Hz), 29943-42-8
29943-42-8 Dihydro-2H-pyran-4(3H)-one 121599, aTetrahydropyrans compound, is more and more widely used in various fields.
Reference£º
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; RIETHER, Doris; ZINDELL, Renee, M.; ERMANN, Monika; WO2011/109324; (2011); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics