nucleophilic bromination at the C5-position of tryptophol and tryptamine derivatives is difficult and remains unexplored. Herein, we report a tunable water-mediated electrooxidative protocol for the dearomative C3/C5-bromocyclization of tryptophol and tryptamine derivatives. This electrosynthetic approach enables selective construction of cyclic 3a- or 5a-bromoindolines simply by the addition of different
NAD(+)-dependent histone deacetylases, sirtuins, cleave acetyl groups from lysines of histones and other proteins to regulate their activity. Identification of potent selective inhibitors would help to elucidate sirtuin biology and could lead to useful therapeutic agents. NAD(+) has an adenosine moiety that is also present in the kinase cofactor ATP. Kinase inhibitors based upon adenosine mimesis may thus also target NAD(+)-dependent enzymes. We present a systematic approach using adenosine mimics from one cofactor class (kinase inhibitors) as a viable method to generate new lead structures in another cofactor class (sirtuin inhibitors). Our findings have broad implications for medicinal chemistry and specifically for sirtuin inhibitor design. Our results also raise a question as to whether selectivity profiling for kinase inhibitors should be limited to ATP-dependent targets.
Novel, potent and selective cyclin D1/CDK4 inhibitors: indolo[6,7-a]pyrrolo[3,4-c]carbazoles
作者:Thomas A. Engler、Kelly Furness、Sushant Malhotra、Concha Sanchez-Martinez、Chuan Shih、Walter Xie、Guoxin Zhu、Xun Zhou、Scott Conner、Margaret M. Faul、Kevin A. Sullivan、Stanley P. Kolis、Harold B. Brooks、Bharvin Patel、Richard M. Schultz、Tammy B. DeHahn、Kashif Kirmani、Charles D. Spencer、Scott A. Watkins、Eileen L. Considine、Jack A. Dempsey、Catherine A. Ogg、Nancy B. Stamm、Bryan D. Anderson、Robert M. Campbell、Vasu Vasudevan、Michelle L. Lytle
DOI:10.1016/s0960-894x(03)00461-x
日期:2003.7
The synthesis and CDK inhibitory properties of a series of indolo[6,7-a]pyrrolo[3,4-c]carbazoles is reported. In addition to their potent CDK activity, the compounds display antiproliferative activity against two human cancer cell lines. These inhibitors also effect strong G1 arrest in these cell lines and inhibit Rb phosphorylation at Ser780 consistent with inhibition of cyclin D1/CDK4.
Nitrite-catalyzed economic and sustainable bromocyclization of tryptamines/tryptophols to access hexahydropyrrolo[2,3-b]indoles/tetrahydrofuroindolines in batch and flow
A highly efficient and concise bromocyclization has been successfully achieved, in which tryptamine/tryptophol derivates can be transformed to valuable HPI/TFI scaffolds with economic and green manners. Moreover, a controllable cascade transformation of bromocyclization and aromatic bromination has also been smoothly achieved to form dibrominated HPIs and TFIs. Production could be successfully scaled