Bifunctional chiral auxiliaries 2: the synthesis of 1,3-diacylimidazolidin-2-ones from 1,2-diamines
摘要:
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.
Bifunctional chiral auxiliaries 2: the synthesis of 1,3-diacylimidazolidin-2-ones from 1,2-diamines
摘要:
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.
Bifunctional chiral auxiliaries 6: Alkylations of enolates derived from 1,3-diacylimidazolidine- 2-thiones and 1,3-diacylimidazolidin-2-ones
作者:Stephen G. Davies、Gary B. Evans、Andrew A. Mortlock
DOI:10.1016/0957-4166(94)80022-7
日期:1994.4
Sodium and potassium enolates of 1,3-diacylimidazolidin-2-ones undergo clean alkylationreactions with reactive alkylhalides; the latter enolates reacting generally more stereoselectively due, it is proposed, to the lower temperature at which the reactions proceed. The reactions are all stereoregular, with the diastereoisomeric identity of products being established unambiguously by the synthesis