renewable tertiary (S)-norcamphor-basedhydroperoxide 3 has been efficiently obtained by a simple 4-step route. Remarkably, complete diastereocontrol was observed in the hydroperoxidation step. This oxidant, when used in the Ti-catalyzed asymmetricsulfoxidation, showed to be as reactive as previously reported hydroperoxide 2, but more importantly, high chemoselectivity and improved asymmetric induction were
Highly enantioselective oxidation of cyclic dithioacetals by using a Ti(salen) and urea·hydrogen peroxide system
作者:Tomoaki Tanaka、Bunnai Saito、Tsutomu Katsuki
DOI:10.1016/s0040-4039(02)00535-x
日期:2002.4
Asymmetric oxidation of 2-substituted U Sing a Ti(salen) and urea.hydrogen peroxide system in methanol as round to proceed with high enantioselectivity to give the corresponding mono-sulfoxides. (C) 2002 Elsevier Science Ltd. All rights reserved.
BORTOLINI O.; DI FURIA F.; LICINI G.; MODENA G.; ROSSI M., TETRAHEDRON LETT., 27,(1986) N 51, 6257-6260
作者:BORTOLINI O.、 DI FURIA F.、 LICINI G.、 MODENA G.、 ROSSI M.