Bifunctional chiral auxiliaries 6: Alkylations of enolates derived from 1,3-diacylimidazolidine-2-thiones and 1,3-diacylimidazolidin-2-ones
Sodium and potassium enolates of 1,3-diacylimidazolidin-2-ones undergo clean alkylation reactions with reactive alkyl halides; the latter enolates reacting generally more stereoselectively due, it is proposed, to the lower temperature at which the reactio
Davies,Evans,Mortlock
p. 585 - 606
(2007/10/02)
Bifunctional chiral auxiliaries 2: The synthesis of 1,3-diacylimidazolidin-2-ones from 1,2-diamines
The title compounds are readily prepared in three steps via the corresponding 1,3-diacylimidazolidine-2-thiones. The final step involves the novel use of mercury (II) acetate for the conversion of thioureas to ureas.
Davies,Mortlock
p. 4791 - 4794
(2007/10/02)
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