Iron-Catalyzed Dioxygenation of Alkenes and Terminal Alkynes by using (Diacetoxyiodo)benzene as Oxidant
作者:B. T. V. Srinivas、Vikas S. Rawat、Bojja Sreedhar
DOI:10.1002/adsc.201500681
日期:2015.11.16
syn-diacetoxylation of alkenes and 1,2-oxyacetoxylation of terminal alkynes has been developed using (diacetoxyiodo)benzene as oxidant. A broad range of internal and terminal alkenes, including electron-rich as well as electron-deficient alkenes, gave the desired products in good to excellent yields with high diastereoselectivity (up to >99:1 dr). In addition the high catalytic activity of ironcatalysis for the
Copper-Catalyzed Diacetoxylation of Olefins using PhI(OAc)<sub>2</sub> as Oxidant
作者:Jayasree Seayad、Abdul Majeed Seayad、Christina L. L. Chai
DOI:10.1021/ol902813m
日期:2010.4.2
Copper(I) or -(II) salts with weakly coordinating anions catalyze the diacetoxylation of olefins efficiently in the presence of PhI(OAc)(2) as the oxidant under mild conditions, The reaction is effective for aryl, aryl alkyl, as well as aliphatic terminal and internal olefins forming the corresponding vicinal diacetoxy compounds in 70-85% yields and dr (syn/anti) of up to 5.2. Under these conditions, homoallylic alcohols formed the corresponding tetrahydrofuran derivatives in high yields.
Enantioselective Vicinal Diacetoxylation of Alkenes under Chiral Iodine(III) Catalysis
作者:Kilian Muñiz、Thorsten Wöste
DOI:10.1055/s-0035-1561313
日期:——
corresponding vicinal diacetoxylation products with up to 96% ee. A procedure for the intermolecular enantioselective dioxygenation of alkenes under iodine(III) catalysis has been developed. This protocol employs Selectfluor as the terminal oxidant together with a defined C 2-symmetric aryl iodide as the organocatalyst. This enantioselective reaction proceeds under mild conditions and converts a series of