Copper catalyzed enantioselective intramolecular aminooxygenation of alkenes.
Copper catalyzed enantioselective intramolecular aminooxygenation of alkenes.
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DOI:
10.1021/ja806585m
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发表时间:
2008-12-31
影响因子:
15
通讯作者:
Chemler SR
中科院分区:
文献类型:
--
作者:
Fuller PH;Kim JW;Chemler SR
The copper-catalyzed enantioselective intramolecular aminooxygenation of alkenes is reported herein. This is the first report of an enantioselective intramolecular alkene aminooxygenation process.N-Arylsulfonyl-2-allylanilines and 4-pentenylarylsulfonamides cyclize in high yield and with good enantioselectivity, providing new chiral methyleneoxy-functionalized dihydroindolines and pyrrolidines. Tetramethylaminopyridyl radical (TEMPO) serves as both the source of the oxygen and the stoichiometric oxidant. These reactions are catalyzed by copper(II) triflate, complexed with (4S,5R)-Bis-Phbox. The unprotected aminoalcohols can be obtained by sequential dissolving metal reductions of the N−S and O−N bonds.
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