[2+2] Cycloaddition of ketenes with ynamides. A general method for the synthesis of 3-aminocyclobutenone derivatives
نویسندگان
چکیده
منابع مشابه
Chemical reactivity of dihydropyrazine derivatives. Cycloaddition behavior toward ketenes.
The cycloaddition behavior of dihydropyrazines toward ketenes was investigated using single-crystal X-ray structures of the cycloadducts and density functional theory (DFT) calculation data. The reaction proceeds via a stepwise pathway involving an orientation complex prior to formation of the betaine intermediate. This is followed by electrocyclization to afford the 1 : 1 and 1 : 2 adducts bea...
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nano-rods zno as an efficient catalyst for the synthesis of chromene phosphonates, direct amidation and formylation of amines
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ژورنال
عنوان ژورنال: Tetrahedron
سال: 2006
ISSN: 0040-4020
DOI: 10.1016/j.tet.2005.11.088