期刊
TETRAHEDRON
卷 146, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2023.133619
关键词
Michael reaction; Azadienes; 3-Methylbenzofuran-2 (3H); One; tert; leucine derived squaramide catalyst
An enantioselective Michael addition reaction of 3-methylbenzofuran-2(3H)-ones to azadienes catalyzed by an L-tert-leucine derived squaramide catalyst was developed, resulting in the synthesis of a variety of benzofuranones with adjacent quaternary and tertiary carbon centers in high yields, moderate to excellent diastereoselectivities, and enantioselectivities.
An enantioselective Michael addition of 3-methylbenzofuran-2(3H)-ones to azadienes catalyzed by an L-tert- leucine derived squaramide catalyst was developed, by which a variety of benzofuranones bearing adjacent quaternary and tertiary carbon centers were obtained in high yields (up to 98%) with moderate to excellent diastereoselectivities (up to 97:3) and enantioselectivities (up to 97%).
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