Discovery of Kinase Spectrum Selective Macrocycle (16<i>E</i>)-14-Methyl-20-oxa-5,7,14,26-tetraazatetracyclo[19.3.1.1(2,6).1(8,12)]heptacosa-1(25),2(26),3,5,8(27),9,11,16,21,23-decaene (SB1317/TG02), a Potent Inhibitor of Cyclin Dependent Kinases (CDKs), Janus Kinase 2 (JAK2), and Fms-like Tyrosine Kinase-3 (FLT3) for the Treatment of Cancer
作者:Anthony D. William、Angeline C.-H. Lee、Kee Chuan Goh、Stéphanie Blanchard、Anders Poulsen、Ee Ling Teo、Harish Nagaraj、Chai Ping Lee、Haishan Wang、Meredith Williams、Eric T. Sun、Changyong Hu、Ramesh Jayaraman、Mohammed Khalid Pasha、Kantharaj Ethirajulu、Jeanette M. Wood、Brian W. Dymock
DOI:10.1021/jm201112g
日期:2012.1.12
Herein, we describe the design, synthesis, and SAR of a series of unique small molecule macrocycles that show spectrum selective kinase inhibition of CDKs, JAK2, and FLT3. The most promising leads were assessed in vitro for their inhibition of cancer cell proliferation, solubility, CYP450 inhibition, and microsomal stability. This screening cascade revealed 26h as a preferred compound with target IC50 of 13, 73, and 56 nM for CDK2, JAK2 and FLT3, respectively. Pharmacokinetic (PK) studies of 26h in preclinical species showed good oral exposures. Oral efficacy was observed in colon (HCT-116) and lymphoma (Ramos) xenograft studies, in line with the observed PK/PD correlation. 26h (SB1317/TG02) was progressed into development in 2010 and is currently undergoing phase 1 clinical trials in advanced leukemias and multiple myeloma.
Discovery of the Macrocycle 11-(2-Pyrrolidin-1-yl-ethoxy)-14,19-dioxa-5,7,26-triaza-tetracyclo[19.3.1.1(2,6).1(8,12)]heptacosa-1(25),2(26),3,5,8,10,12(27),16,21,23-decaene (SB1518), a Potent Janus Kinase 2/Fms-Like Tyrosine Kinase-3 (JAK2/FLT3) Inhibitor for the Treatment of Myelofibrosis and Lymphoma
作者:Anthony D. William、Angeline C.-H. Lee、Stéphanie Blanchard、Anders Poulsen、Ee Ling Teo、Harish Nagaraj、Evelyn Tan、Dizhong Chen、Meredith Williams、Eric T. Sun、Kee Chuan Goh、Wai Chung Ong、Siok Kun Goh、Stefan Hart、Ramesh Jayaraman、Mohammed Khalid Pasha、Kantharaj Ethirajulu、Jeanette M. Wood、Brian W. Dymock
DOI:10.1021/jm200326p
日期:2011.7.14
Discovery of the activating mutation V617F in Janus Kinase 2 (JAK2(V617F)), a tyrosine kinase critically involved in receptor signaling, recently ignited interest in JAK2 inhibitor therapy as a treatment for myelofibrosis (ME). Herein, we describe the design and synthesis of a series of small molecule 4-aryl-2-aminopyrimidine macrocycles and their biological evaluation against the JAK family of kinase enzymes and FLT3. The most promising leads were assessed for their in vitro ADME properties culminating in the discovery of 21c, a potent JAK2 (IC50 = 23 and 19 nM for JAK2(WT) and JAK2(V617F), respectively) and FLT3 (IC50 = 22 nM) inhibitor with selectivity against JAK1 and JAK3 (IC50 = 1280 and 520 nM, respectively). Further profiling of 21c in preclinical species and mouse xenograft and allograft models is described. Compound 21c (SB1518) was selected as a development candidate and progressed into clinical trials where it is currently in phase 2 for ME and lymphoma.