Catalog No. Size PriceQuantity
M11578-2 2mg solid $105
M11578-10 10mg solid $315


SLF TFA is a synthetic ligand for FK506-binding protein (FKBP) with an affinity of 3.1 μM for FKBP51 and an IC50 of 2.6 μM for FKBP12. SLF TFA can be used in the synthesis of PROTAC.

Product information

CAS Number: 2378802-47-0

Molecular Weight: 638.67

Formula: C32H41F3N2O8

Chemical Name: (1R)-1-(3-aminophenyl)-3-(3, 4-dimethoxyphenyl)propyl (2S)-1-(3, 3-dimethyl-2-oxopentanoyl)piperidine-2-carboxylate; trifluoroacetic acid

Smiles: CC(C)(CC)C(=O)C(=O)N1CCCC[C@H]1C(=O)O[C@H](CCC1C=CC(OC)=C(C=1)OC)C1=CC(N)=CC=C1.OC(=O)C(F)(F)F


InChi: InChI=1S/C30H40N2O6.C2HF3O2/c1-6-30(2,3)27(33)28(34)32-17-8-7-12-23(32)29(35)38-24(21-10-9-11-22(31)19-21)15-13-20-14-16-25(36-4)26(18-20)37-5;3-2(4,5)1(6)7/h9-11,14,16,18-19,23-24H,6-8,12-13,15,17,31H2,1-5H3;(H,6,7)/t23-,24+;/m0./s1

Technical Data

Appearance: Solid Power

Purity: ≥98% (or refer to the Certificate of Analysis)

Solubility: DMSO : 200 mg/mL (313.15 mM; Need ultrasonic)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥360 days if stored properly.

Stock Solution Storage: 0 - 4 oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined

HS Tariff Code: 382200

How to use

In Vitro:

Three scout fragments-KB02, KB03, and KB05 are fused, which cover two different electrophile groups (chloroacetamide and acrylamide) and display broad cysteine reactivity in the human proteome-to the SLF ligand that binds tightly and selectively to FKBP12, a cytosolic prolyl isomerase that has been frequently used to study ligand-induced protein degradation.


  1. Kolos JM, et al. FKBP Ligands-Where We Are and Where to Go? Front Pharmacol. 2018 Dec 5;9:1425.
  2. Wu X, et al. Creating diverse target-binding surfaces on FKBP12: synthesis and evaluation of a rapamycin analogue library. ACS Comb Sci. 2011 Sep 12;13(5):486-95.
  3. Zhang X, et al. Electrophilic PROTACs that degrade nuclear proteins by engaging DCAF16. Nat Chem Biol. 2019 Jul;15(7):737-746.

Products are for research use only. Not for human use.

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