Efficientsilylation of OH group in alcohols, phenols and oximes is described using a catalytic amount of N‐chlorosaccharin and hexamethyldisilazane (HMDS) undermild and solvent‐free conditions. This silylation reaction can be carried out with excellent and interesting various selectivities.
A New Synthesis of Oxime Derivatives from Carbonyl Compounds and<i>N,O</i>-Bis(trimethylsilyl)hydroxylamine
作者:Robert V. Hoffman、Gregory A. Buntain
DOI:10.1055/s-1987-28092
日期:——
Reaction of a series of aldehydes and ketones with the potassium salt of N,O-bis(trimethylsilyl)hydroxylamine (2) gave high yields of the corresponding oximate anion 5. This anion, formed in a Peterson-type reaction, could be protonated to the oxime 7 or trapped in situ with a variety of electrophiles to give O-substituted oxime derivatives.8
An Efficient Synthesis of Dinitrile Derivatives by the Reaction of Oxime Esters or Acid Anhydrides with Cyanotrimethylsilane Catalyzed by La(O<i><sup>i</sup></i>Pr)<sub>3</sub>
作者:Akiko Fujii、Satoshi Sakaguchi、Yasutaka Ishii
DOI:10.1021/jo0055281
日期:2000.9.1
the formation of acyl cyanides as intermediates, followed by the addition of Me(3)SiCN to them. Additionally, the reaction of aceticanhydride with Me(3)SiCN catalyzed by La(O(i)()Pr)(3) gave 1-trimethylsilyloxyethane dinitrile. Thus, various alpha-trimethylsilyloxydinitriles were synthesized in good yields by allowing oxime esters or acid anhydrides to react with Me(3)SiCN in the presence of a catalytic