Reactivity of N-disubstituted aminocarbene complexes of chromium: nitrogen to carbon migration of the benzyl and allyl groups following alkyne insertions
Chromium aminocarbene complexes (CO)5CrC(CH3)N(CH2Ph)(CH3) (3), (CO)5CrC(H)N(CH2Ph)(CH3) (5) and (CO)5CrC(H)N(CH2CHCH2)(CH3) (7) react with diphenylacetylene in boiling benzene to give, after insertions of the alkyne and CO and migration of the benzyl or the allyl group from nitrogen to carbon, substituted 2- and 3-pyrrolinones (10–15). The structures of (CO)5-CrC(CH3)N(CH2Ph)CH3 (3Z) (R 0.031
铬络合物aminocarbene(CO)5 CrC(CH 3)N(CH 2 PH)(CH 3)(3),(CO)5 CrC(H)N(CH 2 PH)(CH 3)(5)和(CO)5 CrC(H)N(CH 2 CHCH 2)(CH 3)(7)与二苯基乙炔的反应在沸腾的苯得到,所述炔烃的插入和CO和迁移,苄基的后或从氮到碳的烯丙基,取代了2-和3-吡咯啉酮(10-15)。(CO)5- CrC(CH 3)N(CH 2)的结构测定了吡咯烷酮10的Ph)CH 3(3 Z)(R 0.031 R w 0.030)和三羰基铬铬配合物(CO)3 Cr(C 24 H 23 ON)(9)(R 0.034 R w 0.035)通过X射线衍射。
Synthesis of dibenzo[e,g]isoindol-1-ones via photoinduced intramolecular annulation of 3,4-diphenyl-1H-pyrrol-2(5H)-ones
An efficient, oxidant and photocatalyst-free approach for the synthesis of polycyclic-fused isoindolinone derivatives is reported via annulation of 3,4-diphenyl-3-pyrrolin-2-ones along with release of the hydrogen gas under an argon atmosphere in EtOH by irradiation with a 500 W mercury lamp at room temperature. The described approach is atom-economic and environmentally friendly and tolerates various