CAS 10039-54-0

Hydroxylamine sulfate

Codes: Molnupiravir-025

Application context (from source-drug indications)

COVID-19Molnupiravir呼吸道合胞体病毒感染MolnupiravirInfluenza virus infectionMolnupiravirRenal impairmentMolnupiravirHepatic function declineMolnupiravir

Source drugs (routes using this intermediate)

Drug	Tier	Expiry
Molnupiravir	Tier B — Position early	-

Position in synthesis routes (up/downstream chain)

Ordered by route registration; left → right is the synthesis direction. The highlighted node is the current CAS; others link to their own profiles.

MolnupiravirOptimised routesteps: 12total yield: /

Molnupiravir-012→Methyl 2,3-O-isopropylidene-beta-D-ribofuranoside→Methyl 5-O-benzoyl-2,3-O-(1-methylethylidene)-beta-D-ribofuranoside→1,2,3-Tri-O-acetyl-5-O-benzoyl-beta-D-ribofuranose→2-Methylpropionyl chloride→N-(2-Oxo-1,2-dihydropyrimidin-4-yl)acetamide→N-Acetyl-2',3'-di-O-acetyl-5'-O-benzoylcytidine→Cytosine-1-beta-D-ribofuranoside→Sulfuric acid 2',3'-O-(1-methylethylidene)cytidine→2',3'-O-(1-Methylethylidene)cytidine→2',3'-O-(1-Methylethylidene)-N-(2-methylpropanoyl)-5'-O-(2-methylpropanoyl)cytidine→Hydroxylamine→Hydroxylamine hydrochloride→Hydroxylamine sulfate→N-Hydroxy-2',3'-O-(1-methylethylidene)-5'-O-(2-methylpropanoyl)cytidine→2-Methylpropionic anhydride

MolnupiravirOptimised routesteps: 4total yield: /

Sulfuric acid 2',3'-O-benzylidenecytidine (1/1)→Sulfuric acid 2',3'-O-methylidenecytidine (1/1)→2',3'-O-Benzylidene-5'-O-(2-methylpropanoyl)cytidine→2',3'-O-Methylidene-5'-O-(2-methylpropanoyl)cytidine→2',3'-O-Benzylidene-N-hydroxy-5'-O-(2-methylpropanoyl)cytidine→N-Hydroxy-2',3'-O-methylidene-5'-O-(2-methylpropanoyl)cytidine→1-(beta-D-Ribofuranosyl)cytosine→2-Methylpropionic anhydride→Hydroxylamine sulfate

MolnupiravirOptimised routesteps: 10total yield: /

2(S)-(1,1,1-Triphenylmethoxymethyl)oxirane→(Vinyl)magnesium bromide→(2S)-1-(Triphenylmethoxy)pent-4-en-2-ol→(3S)-3-[[tert-Butyl(diphenyl)silyl]oxy]-4-(triphenylmethoxy)butanal→(2S,3aS,9aR)-2-[(Triphenylmethoxy)methyl]-2,3,3a,9a-tetrahydro-6H-furo[2',3':4,5][1,3]oxazolo[3,2-a]pyrimidin-6-one→Iodoform→tert-Butyl[[(2S,4E)-5-iodo-1-(triphenylmethoxy)pent-4-en-2-yl]oxy]diphenylsilane→1-[(1E,4S)-4-Hydroxy-5-(triphenylmethoxy)pent-1-en-1-yl]pyrimidine-2,4(1H,3H)-dione→1-[(2R,5S)-5-(Trityloxymethyl)-2,5-dihydrofuran-2-yl]pyrimidine-2,4-dione→[(2S,5R)-5-(2,4-Dioxo-3,4-dihydropyrimidin-1(2H)-yl)-2,5-dihydrofuran-2-yl]methyl 2-methylpropanoate→2,4(1H,3H)-Pyrimidinedione→2-Methylpropionic anhydride→5'-O-(2-Methylpropanoyl)uridine→Hydroxylamine sulfate

Intermediates available on this site

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Supplier	Product	Price band	MOQ	Lead time	Qualifications	Action
Unibest Taizhou GMP-like Site	((3aR,4R,6R,6aR)-6-(4-(hydroxyamino)-2-oxopyrimidin-1(2H)-yl)-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl)methyl isobutyrate Pharmaceutical Intermediates	On request	On request	On request	—

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