As a common heterocyclic compound, it belongs to quinuclidine compound,Quinuclidine-4-carboxylic acid hydrochloride,40117-63-3,Molecular formula: C8H14ClNO351,mainly used in chemical industry, its synthesis route is as follows.,76176-87-9
TBTU (176 mg, 0.55 mmol) was added in one portion to a stirred solution of 8-(1-(3,5-difluorophenyl)pyrrolidin-2-yl)-2-morpholino-4-oxo-4H-chromene-6-carboxylic acid (125 mg, 0.27 mmol) and DIPEA (0.286 mL, 1.64 mmol) at room temperature and stirred for 2.5 h. Thiomorpholine 1-oxide hydrochloride (85 mg, 0.55 mmol) was added to the reaction mixture and stirring was continued for 3 h. The reaction mixture was diluted with DCM, washed with water, brine, dried over MgSO4 and concentrated. The residue was purified by preparative HPLC. The fractions were evaporated to dryness, the residue was dissolved in DCM, dried over MgSO4 and concentrated. The remaining solid was triturated with diethyl ether, filtered, washed with diethyl ether and dried under vacuum at 50 C. to afford 8-[1-(3,5-difluorophenyl)pyrrolidin-2-yl]-2-morpholino-6-(1-oxo-1,4-thiazinane-4-carbonyl)chromen-4-one (87 mg, 57%) as a pale beige solid.Mass Spectrum:m/z [M+H]+=558.Proton NMR Spectrum:(DMSO-d6) 1.75-1.86 (m, 1H), 1.98-2.08 (m, 2H), 2.14 (bs, 0.5H), 2.51-2.58 (m partially hidden by DMSO-d5, 1H), 2.64 (bs, 1H), 2.81 (bs, 1.5H), 2.98 (bs, 1H), 3.27 (bs, 1H), 3.40 (bs, 1H), 3.49-3.65 (m, 5H), 3.64-3.83 (m, 6H), 4.21 (bs, 0.5H), 4.34 (bs, 0.5H), 5.25 (d, 1H), 5.62 (s, 1H), 6.13 (d, 2H), 6.34 (t, 1H), 7.18 (s, 1H), 7.87 (d, 1H)
With the synthetic route has been constantly updated, we look forward to future research findings about Thiomorpholine-1-oxide hydrochloride,belong Thiomorpholine compound
Reference£º
Patent; ASTRAZENECA AB; US2012/264731; (2012); A1;,
Thiomorpholine – Wikipedia
Thiomorpholine | C4H9NS – PubChem