One-Pot Synthesis of β-Amino/β-Hydroxy Selenides and Sulfides from Aziridines and Epoxides
作者:Srinivasan Chandrasekaran、Venkataraman Ganesh
DOI:10.1055/s-0029-1216960
日期:2009.10
Diaryl disulfides and diselenides undergo facile cleavage on treatment with rongalite (sodium hydroxymethanesulfinate) to generate the corresponding thiolate and selenolate species in situ, which effect the ring opening of aziridines and epoxides in a regioselective manner. A simple, mild, cost-effective protocol has been developed to prepare β-amino and β-hydroxy sulfides and selenides in a one-pot operation.
Asymmetric Epoxidation of Aldehydes Catalyzed by New C2-Symmetrical Chiral Sulfide
作者:Miyuki Ishizaki、Osamu Hoshino
DOI:10.3987/com-02-9520
日期:——
Asymmetric synthesis of chiral epoxides from various aldehydes with benzyl bromide was investigated using new C-2-symmetrical chiral sulfides, which were readily prepared from (R,R)-tartaric acid.
Bianchet, Stephen; Potvin, Pierre G., Canadian Journal of Chemistry, 1992, vol. 70, # 8, p. 2256 - 2265
作者:Bianchet, Stephen、Potvin, Pierre G.
DOI:——
日期:——
2-Alkenyl dioxolanylium cations, new reactive dienophiles in low temperature asymmetric Diels-Alder reactions
作者:Arnaud Haudrechy、Willy Picoul、Yves Langlois
DOI:10.1016/s0957-4166(96)00470-3
日期:1997.1
orthoesters 14–22 were prepared by an exchange reaction with orthoester 13. These compounds, after treatment with trimethylsilytriflate or tin(IV) chloride, gave rise to vinyl dioxolanylium cations which proved to be very reactive dienophiles in various Diels-Alder reactions.
Systematic transformation of diethyl (2R,3R)-tartrate into a number of protected or functionalized derivatives of threitol, which are important precursors for many natural products, is carried out employing reductive and oxidative cleavage reactions of benzylidene acetal bond.