کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1324917 1499928 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Addition of pyrroles onto terminal alkynes catalyzed by a dinuclear ruthenium (II) complex
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Addition of pyrroles onto terminal alkynes catalyzed by a dinuclear ruthenium (II) complex
چکیده انگلیسی

The addition of pyrroles onto alkynes has been catalyzed by a dinuclear ruthenium complex, Ru2(CO)4(PPh3)2Br4, resulting in the formation of geminal 2-vinylpyrroles in high yields under mild conditions. Further functionalization with pyrroles or alkynes to afford dipyrrolmethanes or 2,5-bis(vinyl)pyrroles via the vinyl functional group can readily be achieved. A mechanism involving cationic ruthenium complexes was proposed based on the product regioselectivity, deuteration and infrared spectroscopic studies carried out on the catalytic process.

In this work, we report the ability of Ru(CO)4L2Br4 (where L = CO or PPh3) to catalyze the hydroarylation reaction of pyrroles and terminal alkynes. The unprecedented bis(vinyl)pyrroles and mixed pyrrole double addition product was formed in the process..Figure optionsDownload as PowerPoint slideHighlights
► Pyrrole addition onto alkynes has been catalyzed by Ru2(CO)4(PPh3)2Br4.
► Formation of exclusively geminal 2-vinylpyrrole product in high yields.
► Further addition to give dipyrrolmethanes or 2,5-bis(vinyl)pyrroles is possible.
► A mechanism involving cationic ruthenium complexes was proposed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Organometallic Chemistry - Volumes 708–709, 15 June 2012, Pages 58–64
نویسندگان
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