Oxidative cleavage of a tricyclic pyridone to a bicyclic lactam-dione
摘要:
Two equivalents of anhydrous m-chloroperbenzoic acid (m-CPBA) cleaved the pyridone ring of 10-(3-chlorophenyl)-6,8,9,10-tetrahydrobenzo[b][1,8]naphthyridin-5(7H)-one, forming the ten-membered lactam alpha-diketone 12-(3-chlorophenyl)-7,8,9,10-tetrahydropyrido[2,3-b]azecine-5,6,11(12H)-trione. Under aqueous conditions, one equivalent of m-CPBA and the same pyridone formed the lactam alpha-ketol 12-(3-chlorophenyl)-7,8,9,10-tetrahydro-6-hydroxypyrido[2,3-b]azecine-5,11(6H, 12H)-dione, which partly confirmed the postulated mechanism of ring cleavage.
The chemical reactivity of a known anti-psoriasis drug. Part 1: Further insights into the products resulting from oxidative cleavage
作者:Alan M. Jones、Magali M. Lorion、Tomas Lebl、Alexandra M.Z. Slawin、Douglas Philp、Nicholas J. Westwood
DOI:10.1016/j.tet.2010.10.044
日期:2010.12
The oxidative cleavage of the known anti-psoriasis drug 1 to give 2 has been reported previously. Due to the importance of accessing medium-sized ring containing systems via oxidative cleavage, this reaction has been revisited revealing additional information about the structure of 2. Alternative reaction products were identified when the reaction was carried out in the presence of water. The conversion