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CAS 733039-20-8
5-bromo-2-chloro-N-cyclopentylpyrimidin-4-amine
Codes: PALB-003, RIBO-003
Application context (from source-drug indications)
Breast cancerPalbociclibBreast cancerRibociclib Succinate
Source drugs (routes using this intermediate)
| Drug | Tier | Expiry |
|---|---|---|
| Palbociclib | Tier A — Act now | 2027 |
| Ribociclib Succinate | Tier A — Act now | 2029 |
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.
tert-butyl piperazine-1-carboxylate→tert-butyl 4-(6-nitropyridin-3-yl)piperazine-1-carboxylate→5-bromo-2,4-dichloropyrimidine→cyclopentanamine→5-bromo-2-chloro-N-cyclopentylpyrimidin-4-amine→(E)-but-2-enoic acid→2-chloro-8-cyclopentyl-5-methylpyrido[2,3-d]pyrimidin-7(8H)-one→6-bromo-2-chloro-8-cyclopentyl-5-methylpyrido[2,3-d]pyrimidin-7(8H)-one→tert-butyl 4-(6-aminopyridin-3-yl)piperazine-1-carboxylate→tert-butyl 4-(6-((6-bromo-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)amino)pyridin-3-yl)piperazine-1-carboxylate→1-(vinyloxy)butane→tert-butyl 4-(6-((6-(1-butoxyvinyl)-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)amino)pyridin-3-yl)piperazine-1-carboxylate→5-bromo-2-nitropyridine
5-bromo-2,4-dichloropyrimidine→cyclopentanamine→5-bromo-2-chloro-N-cyclopentylpyrimidin-4-amine→prop-2-yn-1-ol→3-(2-chloro-4-(cyclopentylamino)pyrimidin-5-yl)prop-2-yn-1-ol→(2-chloro-7-cyclopentyl-7H-pyrrolo[2,3-d]pyrimidin-6-yl)methanol→dimethylamine→2-chloro-7-cyclopentyl-N,N-dimethyl-7H-pyrrolo[2,3-d]pyrimidine-6-carboxamide→tert-butyl 4-(6-aminopyridin-3-yl)piperazine-1-carboxylate→tert-butyl 4-(6-((7-cyclopentyl-6-(dimethylcarbamoyl)-7H-pyrrolo[2,3-d]pyrimidin-2-yl)amino)pyridin-3-yl)piperazine-1-carboxylate→5-chloro-2-nitropyridine→piperazine→1-(6-nitropyridin-3-yl)piperazine→tert-butyl 4-(6-nitropyridin-3-yl)piperazine-1-carboxylate
Intermediates available on this site
Side-by-side comparison of all listed offers on this CAS; price bands are list-price ranges, final price subject to RFQ confirmation.
| Supplier | Product | Price band | MOQ | Lead time | Qualifications | Action |
|---|---|---|---|---|---|---|
| Qualified Partner — East China API Works | 5-broMo-2-chloro-N-cyclopentylpyriMidin-4-aMine Pharmaceutical Intermediates | On request | On request | On request | — |
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