New dual inhibitors of EGFR and HER2 protein tyrosine kinases
摘要:
A novel series of dual EGFR and HER2 inhibitors based on the pyrrolo[2,1-f][1,2,4]triazine nucleus is described. A general route toward their synthesis, which enables functionalization at multiple sites, has been developed. Biological evaluation in enzymatic and cell-based assays has identified a series of C-6 carbamates with potent biochemical and cellular activities.
The present invention provides compounds of formula I
and pharmaceutically acceptable salts thereof.
The formula I compounds inhibit the tyrosine kinase activity of growth factor receptors such as VEGFR-2, FGFR-1, PDGFR, HER-1, HER-2, thereby making them useful as anti-cancer agents. The formula I compounds are also useful for the treatment of other diseases associated with signal transduction pathways operating through growth factor receptors.
Nonionic Superbase-Promoted Synthesis of Oxazoles and Pyrroles: Facile Synthesis of Porphyrins and .alpha.-C-Acyl Amino Acid Esters
作者:Jiansheng Tang、John G. Verkade
DOI:10.1021/jo00104a041
日期:1994.12
The reaction of acyl chlorides or acid anhydrides with isocyanoacetates in the presence of the superior strong nonionic base P(MeNCH(2)CH(2))(3)N (1) gave oxazoles in 98-99% yield. Treatment of the oxazoles with HCl-MeOH gave alpha-C-acyl amino acid esters in 81-82% yield. The reaction of beta-acetoxy-alpha-nitroalkanes or nitroalkenes with isocyanoacetates in the presence of 1 gave pyrroles in 100% yield. The conjugate acid of 1 can be treated with KO-t-Bu to regenerate 1. Treatment of the pyrroles with LiAlH4, followed by PTSA-CH2(OMe)(2) and oxidation gave porphyrins in 65-69% yield. LiCl, which functions both as a strong nucleophile in the S(N)2 demethylation of the 5,5'-bis(methoxycarbonyl)-3,3',4,4'-tetramethyldipyrromethane 22a and as a Lewis acid in the electrophilic substitution cyclization of paraformaldehyde at dipyrromethane, facilitates the combination of four reactions into a one-pot synthesis of octaethylporphyrin in 67% yield from 22a.
Remarkable solvent effect in Barton–Zard pyrrole synthesis: application in an efficient one-step synthesis of pyrrole derivatives
作者:Apurba Bhattacharya、Sankara Cherukuri、Robert Erik Plata、Nitinchandra Patel、Victoriano Tamez、John A. Grosso、Michael Peddicord、Venkatapuram A. Palaniswamy
DOI:10.1016/j.tetlet.2006.05.167
日期:2006.7
A unique solvent effect encountered in the Barton-Zard pyrrole synthesis was exploited to develop an efficient synthesis of pyrrole-2-esters. The chemistry was extended to a one-pot synthesis of pyrrole-2,4-dicarboxylates. (c) 2006 Elsevier Ltd. All rights reserved.
An efficient electrophilic N-amination utilizing in situ generated chloramine under phase transfer conditions
作者:Apurba Bhattacharya、Nitin C. Patel、Robert Erik Plata、Michael Peddicord、Qingmei Ye、Luca Parlanti、Venkatapuram A. Palaniswamy、John A. Grosso
DOI:10.1016/j.tetlet.2006.05.102
日期:2006.7
An efficient, one-pot, phase transfer N-amination technology was developed. The protocol utilizes chloramine, an inexpensive and safe electrophilic aminating agent potentially viable for commercial manufacturing. (c) 2006 Elsevier Ltd. All rights reserved.