Synthesis of (<i>S</i>)- and (<i>R</i>)-Harmicine from Proline: An Approach Toward Tetrahydro-β-carbolines
作者:Christopher S. Lood、Ari M. P. Koskinen
DOI:10.1002/ejoc.201301903
日期:2014.4
This chiral pool synthesis constitutes a new approach towards C1 substituted tetrahydro-β-carbolines. The developed route makes use of the 9-phenyl-9-fluorenylprotectinggroup strategy of amino acids to prevent racemization of the vulnerable α-amino carbonyl stereocenter. Enantiopure harmicine (> 99 % ee) was obtained in nine steps from commercially available starting material. The synthesis was performed