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

Also known as: Palbociclib-016, Palbociclib Intermediate 4, Palbociclib Impurity 72, Palbociclib Impurity 23, 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, 4-[6-(6-BROMO-8-CYCLOPENTYL-5-METHYL-7-OXO-7,8-DIHYDRO-PYRIDO[2,3-D]PYRIMIDIN-2-YLAMINO)-PYRIDIN-3-YL]-PIPERAZINE-1-CARBOXYLIC ACID TERT-BUTYL ESTER, 1-Piperazinecarboxylic acid, 4-[6-[(6-bromo-8-cyclopentyl-7,8-dihydro-5-methyl-7-oxopyrido[2,3-d]pyrimidin-2-yl)amino]-3-pyridinyl]-, 1,1-dimethylethyl ester, 2-Methyl-2-propanyl 4-{6-[(6-bromo-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)amino]-3-pyridinyl}-1-piperazinecarboxylate, MFCD09834002, 4-[6-[(6-Bromo-8-cyclopentyl-7,8-dihydro-5-methyl-7-oxopyrido[2,3-d]pyrimidin-2-yl)amino]-3-pyridinyl]-1-piperazinecarboxylic acid 1,1-dimethylethyl ester

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 (CAS 571188-82-4) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C27H34BrN7O3 and a molecular weight of 584.508 g/mol. Key properties include a boiling point of 720.0±70.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 389.3±35.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

571188-82-4

Jingsj CID

J-1092684-8

Molecular Formula

C₂₇H₃₄BrN₇O₃

Molecular Weight

584.508 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026