Abstract
The (3-amino-1-ethoxyalkenylidene)pentacarbonylchromium complexes 1 and 8 react with bulkily substituted terminal alkynes 2 and 9 in tetrahydrofuran to give η5-tricarbonyl(dihydroazepinyl)chromium complexes 3 and 12a which can be isolated in low yields. When the reactions are carried out in pyridine, the formal [5+2] cycloaddition is favored, but the complexes of type 12 are immediately further transformed to 2- (isobutyrylmethylene)pyrrolidines 13 in good yields.
Original language | English |
---|---|
Pages (from-to) | 2004-2006 |
Number of pages | 3 |
Journal | Synlett |
Issue number | 12 |
DOIs | |
Publication status | Published - 1999 |