Home/Compounds/Pharmaceutical Intermediate/6-Bromo-2-chloro-8-cyclopentyl-5-methylpyrido[2,3-d]pyrimidin-7(8H)-one
C13H13BrClN3O
342.62 g/mol
Pharmaceutical IntermediateDanger
6-Bromo-2-chloro-8-cyclopentyl-5-methylpyrido[2,3-d]pyrimidin-7(8H)-one
CAS1016636-76-2
Category
Pharmaceutical Intermediate
Compound Class
Heterocycle
Primary Use
Pharmaceutical Intermediate
This compound is a brominated and chlorinated pyridopyrimidinone derivative used as a pharmaceutical intermediate in the manufacturing of palbociclib, a drug substance for cancer research.
Pharmaceutical intermediate for palbociclib
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
Sourcing this compound?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
Related Compounds
ReferenceSame Category
3-(Aminomethyl)-1-azetidinecarboxylic acid phenylmethyl ester
CAS1016731-24-0
pharmaceutical intermediate
ReferenceSame Category
Descarboxymethyl treprostinil
CAS101692-02-8
pharmaceutical intermediate
ReferenceSame Category
4-O-(2-acetamido-3-methylbutyl) 1-O-methyl but-2-enedioate;4-O-[2-(tert-butylcarbamoylamino)-3-methylbutyl] 1-O-methyl but-2-enedioate;4-O-[2-(cyclohexylcarbamoylamino)-3-methylbutyl] 1-O-methyl but-2-enedioate;4-O-[2-(cyclohexylmethylcarbamoylamino)-3-methylbutyl] 1-O-methyl but-2-enedioate;4-O-[2-(ethylcarbamoylamino)-3-methylbutyl] 1-O-methyl but-2-enedioate;1-O-methyl 4-O-[3-methyl-2-(methylcarbamoylamino)butyl] but-2-enedioate;1-O-methyl 4-O-[3-methyl-2-(2-methylpropylcarbamoylamino)butyl] but-2-enedioate;1-O-methyl 4-O-[3-methyl-2-(phenylcarbamoylamino)butyl] but-2-enedioate;1-O-methyl 4-O-[3-methyl-2-(propan-2-ylcarbamoylamino)butyl] but-2-enedioate
CAS101707-17-9
pharmaceutical intermediate
ReferenceSame Category
3-(4-Fluorophenyl)-2-methylpropanoyl chloride
CAS1017183-70-8
pharmaceutical intermediate
Referencesame scaffold
6-acetyl-2-chloro-8-cyclopentyl-5-methylpyrido[2,3-d]pyrimidin-7(8H)-one
CAS1651214-73-1
pharmaceutical intermediate
Referencesame scaffold
2-Chloro-8-cyclopentyl-5-methylpyrido[2,3-d]pyrimidin-7(8H)-one
CAS1013916-37-4
pharmaceutical intermediate
Safety Reference
Danger
H301Toxic if swallowed
H302Harmful if swallowed
H315Causes skin irritation
H319Causes serious eye irritation
H334May cause allergy or asthma symptoms or breathing difficulties if inhaled
H335May cause respiratory irritation
H373May cause damage to organs through prolonged or repeated exposure
Customs Tariff Classification
The international HS code for 6-Bromo-2-chloro-8-cyclopentyl-5-methylpyrido[2,3-d]pyrimidin-7(8H)-one (CAS 1016636-76-2) is 2933.79.
HS code (international, 6-digit)
2933.79
EU CN code (8-digit)
2933 79 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
6-bromo-2-chloro-8-cyclopentyl-5-methylpyrido[2,3-d]pyrimidin-7-one
InChIKey
HJQCAEDIUJXGCQ-UHFFFAOYSA-N
SMILES
CC1=C(C(=O)N(C2=NC(=NC=C12)Cl)C3CCCC3)Br
Synonyms (9)
- Palbociclib Impurity 25
- palbociclib intermediate
Sourcing this compound?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.