کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1326083 1499953 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
[6 + 3] Cycloaddition of Fischer aminocarbene complexes: An efficient annulation of fulvenes to indene derivatives
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
[6 + 3] Cycloaddition of Fischer aminocarbene complexes: An efficient annulation of fulvenes to indene derivatives
چکیده انگلیسی

Alkenyl(amino)carbene chromium(0) complexes 1 undergo regioselective [6 + 3] cycloaddition to pentafulvenes 2, affording substituted dihydroindenes 5a–d and indene 6. In the case of 6,6-dimethylpentafulvene 2a dihydroindene chromium complexes 4a–c were also isolated. Isopropylfulvene 2b similarly produces 5d or, under oxidative reaction conditions, the indene 6. The reaction involves: (i) 1,2-nucleophilic addition of fulvene to the carbene carbon, (ii) [1,2]-Cr(CO)5 migration, (iii) either metal–indene coordination or reductive metal elimination/aromatization.

Fischer alkenyl aminocarbene complexes smoothly undergo a [6 + 3] cyclization reaction to fulvenes. This process allows to access 6,7-dihydro-4-amino-5H-indene and 7-amino-1H-indene derivatives.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Organometallic Chemistry - Volume 690, Issues 24–25, 1 December 2005, Pages 5696–5700
نویسندگان
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