A new method for the synthesis of chromium, molybdenum, and tungsten Fischer-type vinylaminocarbenes 3 by the metathesis reaction of 2-amino-1,3-butadienes and phenyloxycarbenes is reported. In addition, the reaction of 3 with electron-deficient alkenes to afford, after hydrolysis, the vinyl ketones 6 has been studied. In order to explain this behavior, a cyclopropanation process has been proposed, which is supported by the formation of the seven-membered ring 8 from diene 7.