Synthesis of Differentially Protected Azatryptophan Analogs via Pd2(dba)3/XPhos Catalyzed Negishi Coupling of N-Ts Azaindole Halides with Zinc Derivative from Fmoc-Protected tert-Butyl (R)-2-Amino-3-iodopropanoate
摘要:
Unnatural amino acids play an important role in peptide based drug discovery. Herein, we report a class of differentially protected azatryptophan derivatives synthesized from N-tosyl-3-haloazaindoles 1 and Fmoc-protected tert-butyl iodoalanine 2 via a Negishi coupling. Through ligand screening, Pd-2(dba)(3)/XPhos was found to be a superior catalyst for the coupling of 1 with the zinc derivative of 2 to give tert-butyl (S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-(1-tosyl-1H-pyrrolo[2,3-b]pyridin-3-yl)propanoate derivatives 3 in 69-91% isolated yields. In addition, we have demonstrated that the protecting groups, namely, Ts, Fmoc, and Bu-t, can be easily removed selectively.
The present invention relates to compounds of formula (I) or pharmaceutical acceptable salts,
wherein R1a, R1b, R1c, X, and Y are defined in the description. The present invention relates also to compositions containing said compounds which are useful for inhibiting kinases such as Cdc7 and methods of treating diseases such as cancer.
There are described compounds of formula (I): and there use as a medicament in the treatment of conditions involving abnormal activation and/or malfunction of the of the hedgehog pathway, such as cancer, fibrosis and chronic graft-versus-host disease (cGVHD).
Synthesis of Differentially Protected Azatryptophan Analogs via Pd<sub>2</sub>(dba)<sub>3</sub>/XPhos Catalyzed Negishi Coupling of <i>N</i>-Ts Azaindole Halides with Zinc Derivative from Fmoc-Protected <i>tert</i>-Butyl (<i>R</i>)-2-Amino-3-iodopropanoate
作者:Roshan Y Nimje、Devaiah Vytla、Prakasam Kuppusamy、Rajeswari Velayuthaperumal、Lokesh Babu Jarugu、China Anki Reddy、Nanjundaswamy Kanikahalli Chikkananjaiah、Richard A. Rampulla、Cullen L. Cavallaro、Jianqing Li、Arvind Mathur、Anuradha Gupta、Amrita Roy
DOI:10.1021/acs.joc.0c00973
日期:2020.9.4
Unnatural amino acids play an important role in peptide based drug discovery. Herein, we report a class of differentially protected azatryptophan derivatives synthesized from N-tosyl-3-haloazaindoles 1 and Fmoc-protected tert-butyl iodoalanine 2 via a Negishi coupling. Through ligand screening, Pd-2(dba)(3)/XPhos was found to be a superior catalyst for the coupling of 1 with the zinc derivative of 2 to give tert-butyl (S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-(1-tosyl-1H-pyrrolo[2,3-b]pyridin-3-yl)propanoate derivatives 3 in 69-91% isolated yields. In addition, we have demonstrated that the protecting groups, namely, Ts, Fmoc, and Bu-t, can be easily removed selectively.
PYRROLOPYRIDINE INHIBITORS OF KINASES
申请人:Florjancic Alan S.
公开号:US20110015173A1
公开(公告)日:2011-01-20
The present invention relates to compounds of formula (I) or pharmaceutical acceptable salts,
wherein R
1a
, R
1b
, R
1c
, X, and Y are defined in the description. The present invention relates also to compositions containing said compounds which are useful for inhibiting kinases such as Cdc7 and methods of treating diseases such as cancer.