BI 224436

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BI 224436
BI 224436.svg
Clinical data
ATC code
  • none
Legal status
Legal status
  • Investigational
Pharmacokinetic data
Elimination half-life7 hrs (simulated)[1]
  • (2S)-[4-(2,3-Dihydropyrano[4,3,2-de]quinolin-7-yl)-2-methyl-3-quinolinyl][(2-methyl-2-propanyl)oxy]acetic acid
CAS Number
PubChem CID
Chemical and physical data
Molar mass442.515 g·mol−1
3D model (JSmol)
  • CC1=NC2=CC=CC=C2C(=C1[C@@H](C(=O)O)OC(C)(C)C)C3=C4C5=C(C=C3)OCCC5=CC=N4
  • InChI=1S/C27H26N2O4/c1-15-21(25(26(30)31)33-27(2,3)4)23(17-7-5-6-8-19(17)29-15)18-9-10-20-22-16(12-14-32-20)11-13-28-24(18)22/h5-11,13,25H,12,14H2,1-4H3,(H,30,31)/t25-/m0/s1

BI 224436 was an investigational new drug under development for the treatment of HIV infection. BI 224436 is the first non-catalytic site integrase inhibitor (NCINI). It inhibits HIV replication via binding to a conserved allosteric pocket of the HIV integrase enzyme. This makes the drug distinct in its mechanism of action compared to raltegravir and elvitegravir, which bind at the catalytic site.[2] In October 2011, Gilead Sciences purchased exclusive rights to develop BI 224436 and several related compounds under investigation in Boehringer Ingelheim’s noncatalytic site integrase inhibitor program.[3][4]

Clinical trials were abandoned in advance of Phase 1.[5]


  1. ^ Brown A, McSharry J, Kulawy R (17 September 2011). Pharmacodynamics of BI 224436 for HIV-1 in an in vitro hollow fiber infection model system. 51st Interscience conference on antimicrobial agents and chemotherapy. Chicago. pp. 17–20.
  2. ^ Fenwick C, Bethell R, Cordingley M, Edwards P, Quinson AM, Robinson P, Simoneau B, Yoakim C (17 September 2011). Levin J (ed.). BI 224436, a non-catalytic site integrase inhibitor, is a potent inhibitor of the replication of treatment-naïve and raltegravir-resistant clinical isolates of HIV-1. 51st Interscience Conference on Antimicrobials and Chemotherapy. Chicago: ICAAC.
  3. ^ "Gilead Negotiates Worldwide License to BI's Early Clinical Stage HIV Program". Genetic Engineering and Biotechnology News. 6 October 2011. Archived from the original on 23 January 2013.
  4. ^ Highleyman L (7 October 2011). "ICAAC: New Integrase Inhibitor BI 224436 Active against Raltegravir-Resistant HIV".
  5. ^ Clinical trial number NCT01276990 for "Safety and Pharmacokinetics of Multiple Rising Oral Doses of BI 224436 in Healthy Male Volunteers." at