Compounds of the formula
wherein
or
and Q is O. S or SO2; R. R,, R2, R3, R4 are H or various organic groups, or R, can be halogen; R5, R6, R7. R8 and R9 are various organic groups;
式中的化合物 其中 或 和 Q 是 O. S 或 SO2;R. R、、R2、R3、R4 是 H 或各种有机基团,或 R 可以是卤素;R5、R6、R7、R8 和 R9 是各种有机基团;
US4514211A
申请人:——
公开号:US4514211A
公开(公告)日:1985-04-30
Direct and Catalytic Amide Synthesis from Ketones via Transoximation and Beckmann Rearrangement under Mild Conditions
The Brønsted acid-catalyzed synthesis of secondary amides from ketones under mild conditions is described via transoximation and Beckmann rearrangement using O-protected oximes as more stable equivalents of explosive O-protected hydroxylamines. This methodology could be applied to highly rearrangement-selective amide synthesis from α-branched alkyl arylketones and performed on a 1-g scale. The presence