1: ethyl allenecarboxylate With trimethylsilylazide in N,N-dimethyl-formamide 2 h; 2: acetylacetone With trimethylsilylazide; acetic acid in methanol 4 h; Irradiation;
参考文献
Sajna, K. V.; Swamy, K. C. Kumara
Journal of Organic Chemistry, 2012 , vol. 77, # 19 p. 8712 - 8722,11