CONVENIENT SYNTHESES OF PIPERAZINE-2,5-DIONES AND LACTAMS FROM HALOCARBOXAMIDES USING PHASE TRANSFER CATALYSTS
作者:Tadashi Okawara、Yoshihide Noguchi、Takashi Matsuda、Mitsuru Furukawa
DOI:10.1246/cl.1981.185
日期:1981.2.5
Inter- and intra-molecular N-alkylation of α-halocarboxamides and dihalocarboxamides in the presence of solid phase transfer catalyst led to the corresponding piperazine-2,5-diones (2) and lactams (4) in the yields of 64–88 and 63–99%, respectively. A one-pot synthesis of β-lactams (7) from α-methyl-α,β-dibromopropionyl chloride (5) and α-amino acid using phase transfer catalyst was also successfully achieved.
在固体相转移催化剂存在下,α-卤代羧酰胺和二卤代羧酰胺的分子间和分子内N-烷基化反应,分别以64-88%和63-99%的产率得到相应的哌嗪-2,5-二酮(2)和内酰胺(4)。通过相转移催化剂,从α-甲基-α,β-二溴丙酰氯(5)和α-氨基酸进行一步合成β-内酰胺(7)也成功实现。