A catalytic approach to the MH-031 lactone: application to the synthesis of geralcin analogs
                                
                                    
                                        作者:Rodolfo Tello-Aburto、Alyssa N. Lucero、Snezna Rogelj                                    
                                    
                                        DOI:10.1016/j.tetlet.2014.09.088
                                    
                                    
                                        日期:2014.11
                                    
                                    A concise, 5-step synthesis of the hepatoprotective lactone MH-031 was achieved. Our approach utilizes several catalytic processes, namely, a Rauhut-Currier reaction, a chemoselective Fisher esterification, and a ring closing metathesis. Further elaboration of this lactone yielded the hydrazide natural product geralcin A and dihydrogeralcin B, a saturated analog of geralcin B. Biological evaluation of the latter indicated that the presence of the enehydrazide moiety in geralcin B is critical for anticancer activity. Published by Elsevier Ltd.