Synthesis of 2,4,5-trisubstituted oxazoles through tin(IV) chloride-mediated reaction of trans-2-aryl-3-nitro-cyclopropane-1,1-dicarboxylates with nitriles.
نویسندگان
چکیده
trans-2-Aryl-3-nitro-cyclopropane-1,1-dicarboxylates when reacted with nitriles in the presence of tin(IV) chloride afford 2,4,5-trisubstituted oxazoles in good to excellent yields. The reactions take place through in situ generation of aroylmethylidene malonates from the cyclopropanes, followed by conjugate addition of nitriles to the malonates to form nitrilium ion intermediates and subsequent cyclisation.
منابع مشابه
Synthesis of highly substituted oxazoles through iodine(III)-mediated reactions of ketones with nitriles.
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عنوان ژورنال:
- Chemical communications
دوره 50 74 شماره
صفحات -
تاریخ انتشار 2014