名称:
                                A rapid and efficient entry to synthesis of quino and chromenocarbazoles via Ullmann–Goldberg condensation
                             
                            
                                摘要:
                                An efficient two-step method for the preparation of quino and chromenocarbazoles via Ullmann-Goldberg condensation of 3-aminocarbazole and 3-hydroxy-9-ethylcarbazole with o-halobenzoic acids followed by cyclization with POCl3 has been described. (C) 2009 Elsevier Ltd. All rights reserved.
                             
                                                            
                                    DOI:
                                    10.1016/j.tet.2009.05.061