Perchloric Acid → 3-{2-[(2R,3R,4S,5R)-4,5-dihydroxy-2-{2-[4-(6-methoxypyridin-3-yl)phenyl]ethyl}tetrahydrofuran-3-yl]ethyl}-1,2,3-benzotriazin-4(3H)-one

HRID 84002Notes

Reaction equation

Cl(O)(=O)(=O)=O.[CH3:6][O:7][C:8]1[N:13]=[CH:12][C:11]([C:14]2[CH:19]=[CH:18][C:17]([CH2:20][CH2:21][C@H:22]3[O:31][C@H:25]4[O:26]C(C)(C)[O:28][C@H:24]4[C@H:23]3[CH2:32][CH2:33][N:34]3[C:39](=[O:40])[C:38]4[CH:41]=[CH:42][CH:43]=[CH:44][C:37]=4[N:36]=[N:35]3)=[CH:16][CH:15]=2)=[CH:10][CH:9]=1>C(#N)C.C(OCC)(=O)C.O>[OH:28][C@@H:24]1[C@H:25]([OH:26])[O:31][C@H:22]([CH2:21][CH2:20][C:17]2[CH:18]=[CH:19][C:14]([C:11]3[CH:12]=[N:13][C:8]([O:7][CH3:6])=[CH:9][CH:10]=3)=[CH:15][CH:16]=2)[C@@H:23]1[CH2:32][CH2:33][N:34]1[C:39](=[O:40])[C:38]2[CH:41]=[CH:42][CH:43]=[CH:44][C:37]=2[N:36]=[N:35]1

Participants

Conditions

Temperature: 55 °C

Procedure

Perchloric acid (4.8 mL) was added to a solution of the compound obtained from step c above (8.1 g) in acetonitrile (50 mL) and water (8 mL) at room temperature. The reaction mixture was heated to 55° C. for 30 minutes. The reaction mixture was then quenched using sodium bicarbonate solution. The solvents were evaporated under reduced pressure. The residue thus obtained was taken up in ethyl acetate and water. The organic layer was separated, washed with water and brine solution, and dried over anhydrous sodium sulphate. The solvent was concentrated under reduced pressure to yield the title compound (8 g).

Workup

customat room temperature
customThe reaction mixture was then quenched
customThe solvents were evaporated under reduced pressure
customThe residue thus obtained
customThe organic layer was separated
washwashed with water and brine solution
dry with materialdried over anhydrous sodium sulphate
concentrationThe solvent was concentrated under reduced pressure

Sources & evidence

ORD record: ord-1836a01bcacd47f8b9f1257fb990bd0b
Source dataset: uspto-grants-2014_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08846910B2

Reaction notes

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