کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5275447 1385534 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Diastereocontrol in [4+4]-photocycloadditions of pyran-2-ones: effect of ring substituents and chiral ketal
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Diastereocontrol in [4+4]-photocycloadditions of pyran-2-ones: effect of ring substituents and chiral ketal
چکیده انگلیسی

4-Mesyloxypyran-2-ones joined to furan by a three-carbon linker undergo intramolecular-crossed [4+4]-photocycloaddition with high or complete selectivity for the exo cycloadduct. When a C2-symmetric ketal was present on the tether adjacent to the pyranone ring, moderate levels of asymmetric induction were obtained.

Photochemical [4+4]-cycloadditions of 4-mesyloxypyran-2-ones with pendent furans occurred with high exo selectivity and displayed moderate diastereocontrol when substituted with a C2-symmetric ketal in the three-carbon tether ketal.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tetrahedron Letters - Volume 50, Issue 11, 18 March 2009, Pages 1188-1192
نویسندگان
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