Reactions of enol ethers and silyl ketene acetals with 3-acetoxyamino-2-ethylquinazolin-4(3H)-one: cleavage of N–N bonds in 3-alkylaminoquinazolin-4(3H)-ones
作者:Robert S. Atkinson、Brian J. Kelly、John Williams
DOI:10.1039/c39920000373
日期:——
Treatment of enol ethers and silyl ketene acetals with the N-acetoxyaminoquinazolone 1 gives α-aminoaaldehyde, α-aminoketone or α-aminoacid derivatives in good yields: cleavage of the NâN bond in 3-alkylaminoquinazolinone derivatives can be accomplished by samarium diiodide in tetrahydrofuran.
Amination with 3-acetoxyaminoquinazolin-4-(3h)ones: preparation of α-aminoacid esters by reaction with silyl ketene acetals followed by NN bond cleavage
作者:Robert S. Atkinson、Brian J. Kelly、John Williams
DOI:10.1016/s0040-4020(01)90382-5
日期:1992.9
Solutions of 3-acetoxyaminoquinazolinone (5) react with enol ethers and silyl ketene acetals to give α-aminoaldehyde α-aminoketone or α-aminoacid derivatives. Acylation of the exocyclic nitrogen in these derivatives, as a preliminary to reductive NN bond cleavage, could only be accomplished by indirect means. Samarium diiodide, however, effected the reduction of this NN bond without the necessity