Year 2007, Month 12 (Section Full Articles, Page 2479)
Sulfur ylides 15.* Intramolecular cyclization of new keto-stabilized sulfur bis-ylide
F. Z. Galin, I. M. Sakhautdinov, I. G. Khalikov, S. N. Lakeev, I. O. Maidanova, and A. A. Fatykhov
New sulfur bis-ylide was obtained from 3-amino-3-phenylpropionic acid and pyromellitic dianhydride. Its intramolecular cyclization proceeds regioselectively, leading to 3,4,11,12-tetrahydro-2Í,6H-indolizino[2,1-f]pyrido[2,1-à]isoindole derivative in 66% yield. Phosphorus bis-ylide of similar structure gives a cyclization product in 10% yield.
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