کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10579892 | 980437 | 2007 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Stereoselective [4+2] cycloadditions of tetrazines to 3-oxo- and 3-arylimino-4â²-methylenedihydro-3â²H-spiro[bicyclo[2.2.1]heptane-2,2â²-furans]
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی معدنی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Stereoselective inverse-demand [4+2] cycloadditions of 3,6-bis(pyridin-2-yl)-1,2,4,5-tetrazine and dimethyl 1,2,4,5-tetrazine-3,6-dicarboxylate to 4â²-methylenedihydro-3â²H-spiro[bicyclo[2.2.1]heptane-2,2â²-furans] and 4â²-methylene-1â²-(4-nitrophenyl)spiro[bicyclo[2.2.1]heptane-3,2â²-pyrrolidine] were studied. Cycloadditions took place stereoselectively at the exocyclic CC double bonds to give novel 11:14-isopropylidene-14-methyl-2,3-diaza-8-oxadispiro[5.1.5.2]pentadecane and 11:14-isopropylidene-11-methyl-2,3,8-triazadispiro[5.1.5.2]pentadecane derivatives in 50-98% de. The structures of the novel dispiro compounds were determined by NMR techniques, NOESY spectroscopy and X-ray diffraction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tetrahedron: Asymmetry - Volume 18, Issue 23, 26 November 2007, Pages 2746-2757
Journal: Tetrahedron: Asymmetry - Volume 18, Issue 23, 26 November 2007, Pages 2746-2757
نویسندگان
Uroš Grošelj, Anton Meden, Branko Stanovnik, Jurij Svete,