不饱和卡宾作为卡宾化学的一个重要分支巳日益引起了人们的兴趣。研究这类活泼的反应中间体,不仅具有一定的理论价值,而且为合成高张力的小环化合物提供了方便的途径。但由于制备不饱和卡宾的前体化合物一般较难得到,所以不饱和卡宾 Unsaturated carbenes have drawn increasing interest as an important branch of Carbide chemistry. The study of such reactive intermediates not only has certain theoretical value, but also provides a convenient way for the synthesis of high-tension small ring compounds. However, since the preparation of unsaturated carbene precursor compounds are generally more difficult to obtain, so unsaturated carbene