N-(Trimethylsilyl)formaldimine-AlCl3 complex 2b was generated by treating (trimethylsilyl)methyl azide with AlCl3. The reaction of 2b with various kinds of enol triisopropylsilyl ethers afforded alpha'-aminomethylated enol silyl ethers in good yields.
Applications of the β-Azidonation Reaction to Organic Synthesis. α,β-Enones, Conjugate Addition, and γ-Lactam Annulation
作者:Philip Magnus、Jérôme Lacour、P. Andrew Evans、Pascal Rigollier、Hans Tobler
DOI:10.1021/ja9829564
日期:1998.12.1
The β-azido functionalization reaction provides a mechanistically different enone synthesis that involves treatment of 2 with fluoride anion to effect desilylation and concomitant β-elimination to give 3. Table 1 lists a number of examples of the direct conversion of a TIPS enolether into the corresponding α,β-enone via a β-azido TIPS enolether. The β-azido group can be ionized with Me3Al or Me2AlCl