Continuous synthesis of pyridocarbazoles and initial photophysical and bioprobe characterization
作者:D. Tyler McQuade、Alexander G. O'Brien、Markus Dörr、Rajathees Rajaratnam、Ursula Eisold、Bopanna Monnanda、Tomoya Nobuta、Hans-Gerd Löhmannsröben、Eric Meggers、Peter H. Seeberger
DOI:10.1039/c3sc51846a
日期:——
Pyridocarbazoles when ligated to transition metals yield high affinity kinase inhibitors. While batch photocyclizations enable the synthesis of these heterocycles, the non-oxidative Mallory reaction only provides modest yields and difficult to purify mixtures. We demonstrate here that a flow-based Mallory cyclization provides superior results and enables observation of a clear isobestic point. The
吡啶并咔唑与过渡金属连接时会产生高亲和力的激酶抑制剂。虽然分批光环化能够合成这些杂环,但非氧化性马洛里反应仅能提供中等收率,并且难以纯化混合物。在这里,我们证明了基于流动的Mallory环化可提供出色的结果,并能够观察到清晰的等渗点。流动方法使我们能够快速合成十种吡啶并咔唑,并首次记录了它们有趣的光物理属性。初步表征表明,这些分子可能是一类新型的荧光生物探针。