Synthesis and reactivity of the 1,1-dilithio derivatives of alkyl phenyl sulfones and N,N-dimethyl methanesulfonamide
作者:A. Bongini、D. Savoia、A. Umani-Ronchi
DOI:10.1016/s0022-328x(00)89360-2
日期:1976.5
Alkylphenyl sulfones Ia,b and N,N-dimethyl methanesulfonamide (Ic) are rapidly converted into their 1,1-dilithio salts IIa–c on reaction with n-butyllithium in THF—hexane. The nature of these new organometallicspecies was confirmed by deuteration and condensation with benzaldehyde. The gem-dimetallo derivatives Va–c and VIa, obtained from IIa–c by lithium—magnesium and lithium—boron exchange respectively
Fournier; Loiseau; Moreau, European Journal of Medicinal Chemistry, 1982, vol. 17, # 1, p. 53 - 58
作者:Fournier、Loiseau、Moreau、et al.
DOI:——
日期:——
A simple reduction of α-bromosulfones by
作者:Mitsuhiro Yoshimatsu、Megumi Ohara
DOI:10.1016/s0040-4039(97)01230-6
日期:1997.8
Reduction of alpha-bromosulfones 1, 5, 13-16 by cat.(PhSe)(2)/NaBH4 occurred site-selectively in high yields. This reduction of 1,3- or 1,4-dibromobis(sulfone) 21 and 25 was applied to intramolecular coupling reactions to give the three- and four-membered carbocycles 26-28. (C) 1997 Elsevier Science Ltd.
SmI2 mediated reductive addition of bis-phenylsulfones to ketones
SmI2 mediates the in situ reductive addition of geminal bis-phenylsulfones to unhindered ketones at room temperature affording beta-hydroxyphenylsulfones in good to excellent yields.