Affiliation:
1. Department of Biology, Chemistry and Environmental Sciences American University of Sharjah 26666 Sharjah United Arab Emirates
2. Sharjah Institute for Medical Research University of Sharjah 27272 Sharjah United Arab Emirates
3. College of Science Department of Chemistry University of Sharjah 27272 Sharjah United Arab Emirates
4. College of Pharmacy University of Sharjah P.O. Box 27272 Sharjah United Arab Emirates
Abstract
AbstractAzepino[3,4,5‐cd]indole derivatives represent the core scaffold of important natural products and biologically relevant compounds. Therefore, the establishment of step‐ and atom‐economic strategies to access this class of compounds is of paramount importance. To this end, complexity‐to‐diversity (CtD) strategy has become one of the most important tools that transforms complex molecules into diverse skeleta. However, many of the reactions that could be employed in CtD are restricted by the functional handles exist in these molecules. This limits the achievement of the desired skeletal diversity. Herein, an efficient and step‐economic strategy to access a diverse collection of azepino‐[3,4,5‐cd]indole architectures through a cascade that combines Pictet‐Spengler with Michael addition, is described. This was achieved by reacting cyclohexadienone acetaldehydes 2 a–2 d with indolyl‐4‐ethyl amine 1. Employing a CtD strategy on the developed azepino‐[3,4,5‐cd]indoles, a rapid rearrangement reaction that provided a modular, chemo‐ and diastereoselective access to diverse collection of spiro azepinocarbazole nature‐inspired frameworks, was encountered.
Funder
American University of Sharjah
Subject
Organic Chemistry,Physical and Theoretical Chemistry