2014 年 72 巻 10 号 p. 1158-1159
The 56-years old “Breslow intermediate” has played a most important role in the umpolung reaction of aldehydes triggered by carbenes such as N-heterocyclic carbenes. Chemists have paid enormous efforts to capture the Breslow intermediate (or its analogues); however, it still remains a challenge. In this review, recent progresses in this field are briefly summarized.