Group 6 Pyrrolocarbene Complexes as Alkoxycarbene Complex Analogs

Metal-Assisted Cycloaddition Reactions in Organotransition Metal Chemistry

“…Pyrrolocarbene complexes of Cr, Mo, and W have been prepared by Hegedus et al, 52 and have been demonstrated to give high yields of pyrrole-substituted cyclopropanes with electron-deficient olefins.…”

Photoinduced Reactions of Metal Carbenes in Organic Synthesis

“…By replacing aliphatic amino groups with the substantially less basic aryl amino groups, modest yields of cyclobutanones were achieved (Table 10) [63], (Table 11) [64]. Both reacted with dihydropyran to give modest yields of cyclobutanone.…”

“…Pyrrolocarbenes produced low yields of b-lactams in photodriven reactions with imines [52], while o-acylimidatocarbene complexes gave a mixture of compounds with b-lactams being minor components [53].…”

Synthesis of nitrogen‐containing compounds using chromium Fischer carbene complexes

“…Scheme shows one possible mechanism: cyclopropanation of 11a with 10a gives an intermediate 13 3,29 . 13 undergoes thermal ring opening30 and successive dehydration to give 12a .…”