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MedKoo Cat#: 526825 | Name: Ritlecitinib malonate
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Description:

WARNING: This product is for research use only, not for human or veterinary use.

Ritlecitinib, also known as PF-06651600, is a potent and selective JAK3 inhibitor. PF-06651600 is a potent and low clearance compound with demonstrated in vivo efficacy. The favorable efficacy and safety profile of this JAK3-specific inhibitor PF-06651600 led to its evaluation in several human clinical studies. JAK3 was among the first of the JAKs targeted for therapeutic intervention due to the strong validation provided by human SCID patients displaying JAK3 deficiencies.

Chemical Structure

Ritlecitinib malonate
Ritlecitinib malonate
CAS#2140301-97-7 (malonate)

Theoretical Analysis

MedKoo Cat#: 526825

Name: Ritlecitinib malonate

CAS#: 2140301-97-7 (malonate)

Chemical Formula: C18H23N5O5

Exact Mass: 0.0000

Molecular Weight: 389.41

Elemental Analysis: C, 55.52; H, 5.95; N, 17.98; O, 20.54

Price and Availability

Size Price Availability Quantity
5mg USD 260.00 2 Weeks
25mg USD 850.00 2 Weeks
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Related CAS #
1792180-81-4 (free base) 2140301-97-7 (malonate) 2192215-81-7 (tosylate) 2489392-29-0 (maleate)
Synonym
Ritlecitinib malonate; PF-06651600; PF 06651600; PF06651600; PF-6651600; PF 6651600; PF6651600;
IUPAC/Chemical Name
1-[(2S,5R)-2-Methyl-5-(7H-pyrrolo[2,3-d]pyrimidin-4-ylamino)-1-piperidinyl]-2-propen-1-one malonate
InChi Key
QMPMPSGDPRHZCG-VZXYPILPSA-N, CBRJPFGIXUFMTM-WDEREUQCSA-N (free base).
InChi Code
InChI=1S/C15H19N5O.C3H4O4/c1-3-13(21)20-8-11(5-4-10(20)2)19-15-12-6-7-16-14(12)17-9-18-15;4-2(5)1-3(6)7/h3,6-7,9-11H,1,4-5,8H2,2H3,(H2,16,17,18,19);1H2,(H,4,5)(H,6,7)/t10-,11+;/m0./s1
SMILES Code
C=CC(N1[C@@H](C)CC[C@@H](NC2=C3C(NC=C3)=NC=N2)C1)=O.O=C(O)CC(O)=O
Appearance
Solid powder
Purity
>98% (or refer to the Certificate of Analysis)
Shipping Condition
Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.
Storage Condition
Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).
Solubility
To be determined
Shelf Life
>2 years if stored properly
Drug Formulation
To be determined
Stock Solution Storage
0 - 4 C for short term (days to weeks), or -20 C for long term (months).
HS Tariff Code
2934.99.9001
More Info
Product Data
Product Data
Instruction
View handling instruction
Biological target:
Ritlecitinib inhibits JAK3 kinase activity with an IC50 of 33.1 nM but without activity (IC50>10 000 nM) against JAK1, JAK2, and TYK2. Ritlecitinib inhibits the phosphorylation of STAT5 elicited by IL-2, IL-4, IL-7, and IL-15 with IC50 values of 244, 340, 407, and 266 nM, respectively. Ritlecitinib inhibits the phosphorylation of STAT3 elicited by IL-21 with an IC50 of 355 nM. Ritlecitinib suppresses Th1 and Th17 differentiation as measured by IFNγ, after 5 days under Th1 conditions, and IL-17 production, after 6 days under Th17 conditions, with IC50 values of 30 nM and 167 nM, respectively. Ritlecitinib suppresses Th1 and Th17 function as measured by the inhibition of IFNγ production (IC50=48 nM) and IL-17 production (IC50=269 nM) in cells that have been previously differentiated and rested.
In vitro activity:
Ritlecitinib impairs the ability of human intraepithelial ILC1 (iILC1) to produce IFN-γ, without affecting ILC3 production of IL-22. Ritlecitinib impaired the proliferation of iILC1 and ILC3 and differentiation of human ILC in vitro. Reference: Mucosal Immunol. 2018 Jan;11(1):50-60. https://pubmed.ncbi.nlm.nih.gov/28513593/
In vivo activity:
Participants taking ritlecitinib had more hair regrowth on their scalp than the controls. Hair regrowth was also seen on the eyebrows and eyelashes in participants taking ritlecitinib. Participants taking ritlecitinib reported that their lopecia areata had moderately or greatly improved after 24 weeks than those taking the placebo. Reference: Immunotherapy. 2023 Jul 5. Epub ahead of print. https://pubmed.ncbi.nlm.nih.gov/37403610/

Preparing Stock Solutions

The following data is based on the product molecular weight 389.41 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL
Formulation protocol:
1. Robinette ML, Cella M, Telliez JB, Ulland TK, Barrow AD, Capuder K, Gilfillan S, Lin LL, Notarangelo LD, Colonna M. Jak3 deficiency blocks innate lymphoid cell development. Mucosal Immunol. 2018 Jan;11(1):50-60. doi: 10.1038/mi.2017.38. Epub 2017 May 17. PMID: 28513593; PMCID: PMC5693788. 2. King B, Zhang X, Harcha WG, Szepietowski JC, Shapiro J, Lynde C, Mesinkovska NA, Zwillich SH, Napatalung L, Wajsbrot D, Fayyad R, Freyman A, Mitra D, Purohit V, Sinclair R, Wolk R. A plain language summary on ritlecitinib treatment for adults and adolescents with alopecia areata. Immunotherapy. 2023 Jul 5. doi: 10.2217/imt-2023-0069. Epub ahead of print. PMID: 37403610. 3. Robinson MF, Damjanov N, Stamenkovic B, Radunovic G, Kivitz A, Cox L, Manukyan Z, Banfield C, Saunders M, Chandra D, Vincent MS, Mancuso J, Peeva E, Beebe JS. Efficacy and Safety of PF-06651600 (Ritlecitinib), a Novel JAK3/TEC Inhibitor, in Patients With Moderate-to-Severe Rheumatoid Arthritis and an Inadequate Response to Methotrexate. Arthritis Rheumatol. 2020 Oct;72(10):1621-1631. doi: 10.1002/art.41316. Epub 2020 Sep 7. PMID: 32419304; PMCID: PMC7589242.
In vitro protocol:
1. Robinette ML, Cella M, Telliez JB, Ulland TK, Barrow AD, Capuder K, Gilfillan S, Lin LL, Notarangelo LD, Colonna M. Jak3 deficiency blocks innate lymphoid cell development. Mucosal Immunol. 2018 Jan;11(1):50-60. doi: 10.1038/mi.2017.38. Epub 2017 May 17. PMID: 28513593; PMCID: PMC5693788.
In vivo protocol:
1. King B, Zhang X, Harcha WG, Szepietowski JC, Shapiro J, Lynde C, Mesinkovska NA, Zwillich SH, Napatalung L, Wajsbrot D, Fayyad R, Freyman A, Mitra D, Purohit V, Sinclair R, Wolk R. A plain language summary on ritlecitinib treatment for adults and adolescents with alopecia areata. Immunotherapy. 2023 Jul 5. doi: 10.2217/imt-2023-0069. Epub ahead of print. PMID: 37403610. 2. Robinson MF, Damjanov N, Stamenkovic B, Radunovic G, Kivitz A, Cox L, Manukyan Z, Banfield C, Saunders M, Chandra D, Vincent MS, Mancuso J, Peeva E, Beebe JS. Efficacy and Safety of PF-06651600 (Ritlecitinib), a Novel JAK3/TEC Inhibitor, in Patients With Moderate-to-Severe Rheumatoid Arthritis and an Inadequate Response to Methotrexate. Arthritis Rheumatol. 2020 Oct;72(10):1621-1631. doi: 10.1002/art.41316. Epub 2020 Sep 7. PMID: 32419304; PMCID: PMC7589242.
1: D'Amico F, Fiorino G, Furfaro F, Allocca M, Danese S. Janus kinase inhibitors for the treatment of inflammatory bowel diseases: developments from phase I and phase II clinical trials. Expert Opin Investig Drugs. 2018 Jul;27(7):595-599. doi: 10.1080/13543784.2018.1492547. Epub 2018 Jul 6. Review. PubMed PMID: 29938545. 2: Robinette ML, Cella M, Telliez JB, Ulland TK, Barrow AD, Capuder K, Gilfillan S, Lin LL, Notarangelo LD, Colonna M. Jak3 deficiency blocks innate lymphoid cell development. Mucosal Immunol. 2018 Jan;11(1):50-60. doi: 10.1038/mi.2017.38. Epub 2017 May 17. PubMed PMID: 28513593; PubMed Central PMCID: PMC5693788. 3: Thorarensen A, Dowty ME, Banker ME, Juba B, Jussif J, Lin T, Vincent F, Czerwinski RM, Casimiro-Garcia A, Unwalla R, Trujillo JI, Liang S, Balbo P, Che Y, Gilbert AM, Brown MF, Hayward M, Montgomery J, Leung L, Yang X, Soucy S, Hegen M, Coe J, Langille J, Vajdos F, Chrencik J, Telliez JB. Design of a Janus Kinase 3 (JAK3) Specific Inhibitor 1-((2S,5R)-5-((7H-Pyrrolo[2,3-d]pyrimidin-4-yl)amino)-2-methylpiperidin-1-yl)prop -2-en-1-one (PF-06651600) Allowing for the Interrogation of JAK3 Signaling in Humans. J Med Chem. 2017 Mar 9;60(5):1971-1993. doi: 10.1021/acs.jmedchem.6b01694. Epub 2017 Feb 16. PubMed PMID: 28139931. 4: Telliez JB, Dowty ME, Wang L, Jussif J, Lin T, Li L, Moy E, Balbo P, Li W, Zhao Y, Crouse K, Dickinson C, Symanowicz P, Hegen M, Banker ME, Vincent F, Unwalla R, Liang S, Gilbert AM, Brown MF, Hayward M, Montgomery J, Yang X, Bauman J, Trujillo JI, Casimiro-Garcia A, Vajdos FF, Leung L, Geoghegan KF, Quazi A, Xuan D, Jones L, Hett E, Wright K, Clark JD, Thorarensen A. Discovery of a JAK3-Selective Inhibitor: Functional Differentiation of JAK3-Selective Inhibition over pan-JAK or JAK1-Selective Inhibition. ACS Chem Biol. 2016 Dec 16;11(12):3442-3451. Epub 2016 Nov 10. PubMed PMID: 27791347. 5: Walker G, Croasdell G. The European League Against Rheumatism (EULAR) - 17th Annual European Congress of Rheumatology (June 8-11, 2016 - London, UK). Drugs Today (Barc). 2016 Jun;52(6):355-60. doi: 10.1358/dot.2016.52.6.2516435. PubMed PMID: 27458612.