Ligand/PTC-free intramolecular Heck reaction: synthesis of pyrroloquinoxalines and their evaluation against PDE4/luciferase/oral cancer cell growth in vitro and zebrafish in vivo
作者:P. Vijaya Babu、Soumita Mukherjee、Girdhar Singh Deora、Keerthana Sarma Chennubhotla、Raghavender Medisetti、Swapna Yellanki、Pushkar Kulkarni、Shivashankar Sripelly、Kishore V. L. Parsa、Kiranam Chatti、K. Mukkanti、Manojit Pal
DOI:10.1039/c3ob41504j
日期:——
A series of 1,3-disubstituted pyrrolo[2,3-b]quinoxalines has been designed for the potential inhibition of PDE4 without inhibiting luciferase. A ligand/PTC (phase transfer catalyst) free intramolecular Heck cyclization strategy was used to prepare these compounds, some of which showed significant inhibition of PDE4B (IC50 ≈ 5–14 μM) and growth inhibition of oral cancer cells (CAL 27) but not inhibition of luciferase in vitro. They also showed acceptable safety profiles but no apoptosis in zebrafish embryos.
一系列1,3-二取代吡咯并[2,3-b]喹唑啉被设计用于潜在的PDE4抑制,而不抑制荧光素酶。采用无配体/PTC(相转移催化剂)的分子内Heck环化策略制备这些化合物,其中一些显示出对PDE4B(IC50 ≈ 5–14 μM)的显著抑制作用和对口腔癌细胞(CAL 27)的生长抑制作用,但在体外不抑制荧光素酶。它们还显示出可接受的安全性特征,在斑马鱼胚胎中没有凋亡现象。