Sulfur ylides 13. Synthesis and intramolecular cyclization of keto-stabilized sulfur ylides
作者:F. Z. Galin、I. M. Sakhautdinov、S. N. Lakeev、V. A. Egorov、A. A. Fatykhov、I. O. Maidanova
DOI:10.1007/s11172-006-0202-6
日期:2005.12
were obtained from N-phthalylglutamic acid and their intramolecular cyclization was studied. The intramolecular cyclization of the ylide obtained at the α-carboxy group gave a product of the pyrrolizidinedione structure; bisylide yielded a cycloheptene derivative as the result of intramolecular recombination of intermediate dicarbene. The ylide obtained at the γ-carboxy group underwent no cyclization