Conversion of Carbamates to Amidosulfones and Amides. Synthesis of the [14C]-Labeled Antiobesity Agent Ro23-7637.
摘要:
[GRAPHICS]Carbamates of primary and secondary amines react with the dianion of methyl phenyl sulfone to yield amidosulfones. Alylation of the amidosulfone followed by reductive removal of the sulfonyl residue gives an amide.
Conversion of Carbamates to Amidosulfones and Amides. Synthesis of the [14C]-Labeled Antiobesity Agent Ro23-7637.
摘要:
[GRAPHICS]Carbamates of primary and secondary amines react with the dianion of methyl phenyl sulfone to yield amidosulfones. Alylation of the amidosulfone followed by reductive removal of the sulfonyl residue gives an amide.
backbone and the allyl side chains, Lewis acid-catalyzed three-component condensationreactions of carbonyl compounds, N-trimethylsilylcarbamates, and allyltrimethylsilane are studied. The reaction of these three compounds took place in the presence of a catalytic amount of TrClO4 at 0°C to yield the corresponding N-homoallylcarbamates in good yields. This reaction was also applied to the synthesis of a