α‐aryldiazoacetates in high yield. This methodology was found to be generally applicable to a broad substrate scope and presents a conceptually new approach for organocatalytic diazo insertion reactions. Mechanistic investigations suggest that the reaction pathway involves a urea‐induced protonation of the α‐aryldiazoester.
                                    事实证明,增强二
氟硼酸脲的催化活性对于提高酸度α-芳基
重氮乙酸酯的无
金属OH和SH插入反应而言是必不可少的。发现该方法通常适用于广泛的底物范围,并且提出了用于有机催化重氮插入反应的概念上新的方法。机理研究表明,该反应途径涉及
尿素诱导的α-芳基重氮酯的质子化。