Polyethylene glycol (PEG) 4000 catalysed regioselective nucleophilic ring opening of oxiranes - A new and convenient synthesis of β-hydroxy sulfone and β-hydroxy sulfide
作者:A.K. Maiti、P. Bhattacharyya
DOI:10.1016/s0040-4020(01)89588-0
日期:1994.1
Oxiranes and sodium p-toluene sulfinate salt react smoothly in a regioselective manner in the presence of PEG4000 to furnish β-hydroxy sulfone and β-hydroxysuifide. The reaction was extended for the preparation of alkylsulfones and β-oxosulfones from alkylhalide and β-oxohalide respectively.
NAJERA, CARMEN;SANSANO, JOSE MIGUEL, TETRAHEDRON, 46,(1990) N1, C. 3993-4002
作者:NAJERA, CARMEN、SANSANO, JOSE MIGUEL
DOI:——
日期:——
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