Facile One-Pot Synthesis of Carbamoylbenzotriazoles Directly from CO2: Synthesis of Tolbutamide
                                
                                    
                                        作者:Roger Hunter、Ath’enkosi Msutu、Cathy Dwyer、Neville Emslie、Raymond Hunt、Barend Bezuidenhoudt                                    
                                    
                                        DOI:10.1055/s-0030-1261222
                                    
                                    
                                        日期:2011.10
                                    
                                    CO2 gas trapped with a primary or secondary amine as a carbamate salt in the presence of DBU reacts with triphenylphosphine and 1-chlorobenzotriazole (BtCl) to form a carbamoylbenzotriazole urea, which reacts with para-toluenesulfonamide under solvent-free conditions to produce N-sulfonyl ureas such as tolbutamide.
                                    在
DBU存在下,
CO2气体与主要或次要胺结合形成
氨基甲酸盐,然后与
三苯基膦和1-
氯苯并三唑(BtCl)反应,生成
氨基甲酰苯并三唑
尿素,该
尿素在无溶剂条件下与对
甲苯磺酰胺反应,生成如
甲苯磺酰
脲等N-磺酰
脲化合物。