Influence of the Reaction Conditions on the Evolution of the Michael Addition of β-Keto Sulfones to α,β-Unsaturated Aldehydes
作者:José Alemán、Vanesa Marcos、Leyre Marzo、José Luis García Ruano
DOI:10.1002/ejoc.201000502
日期:——
studied the influence of different reactionconditions on the conjugated addition of β-keto sulfones to α,β-unsaturated aldehydes catalyzed by silyl prolinol ethers. Small changes in the starting material and/or in the experimental protocol are able to produce significant variations in the structures of the final products. The high chemical versatility of the resulting Michael adducts make possible their
Synthesis of β- and γ-hydroxy sulfones by regioselective opening of β,γ-epoxy sulfones
作者:Carmen Nájera、José Miguel Sansano
DOI:10.1016/s0040-4020(01)90534-4
日期:1990.1
sulfones react regio-selectively with organomagnesium compounds in the presence or not of catalytic amounts of copper(I) bromide to afford β-hydroxy sulfones 2 or γ-tosylated allylic alcoholates 5 respectively. The Michael type addition of Grignard reagents to intermediates 5 in the presence of catalytic amount of copper(l) bromide yields γ-hydroxy sulfones 6. The PCC oxidation of β- and γ-hydroxy sulfones
Oxidative cleavage of α-sulfonyl ketones to carboxylic acids with Ce(NH4)2(NO3)6
作者:Meng-Yang Chang、Chung-Yu Tsai
DOI:10.1016/j.tetlet.2014.08.038
日期:2014.10
Tandem oxidative cleavage of alpha-sulfonyl arylketones 2 with the combination of Ce(NH4)(2)(NO3)(6) and O-2 in MeCN afforded carboxylic acids 3 in moderate to good yields. The plausible reaction mechanism has been discussed. (C) 2014 Elsevier Ltd. All rights reserved.
Cinquini,M. et al., Journal of the Chemical Society. Perkin transactions I, 1978, p. 247 - 249
作者:Cinquini,M. et al.
DOI:——
日期:——
BARRE, V.;MASSIAS, F.;UGUEN, D., TETRAHEDRON LETT., 30,(1989) N2, C. 7389-7392