名称:
                                Decomposition of 2-diazo-1,3-diketones: Stereocontrol of the mechanism.
                             
                            
                                摘要:
                                Complete ''inversion'' of alkyl to aryl migratory tendency in Wolff rearrangement of diazodiketones with Z,Z-conformation was revealed by comparing decomposition behavior of the planar diazo tetralindione with its twisted acyclic analogues. Dramatic change in regioselectivity of this process was accompanied by the appearance of X-H insertion products in the reaction mixture. These data suggest that on the way from planar cyclic to highly skewed acyclic aroylacyldiazomethanes concerted Wolff rearrangement turns into a carbenic process.
                             
                                                            
                                    DOI:
                                    10.1016/s0040-4039(00)60116-8