KAGA, HARUMI;MIURA, MASAKATSU;ORITO, KAZUHIKO, SYNTHESIS (BRD),(1989) N1, C. 864-866
作者:KAGA, HARUMI、MIURA, MASAKATSU、ORITO, KAZUHIKO
DOI:——
日期:——
US4154851A
申请人:——
公开号:US4154851A
公开(公告)日:1979-05-15
A Short Route to Dihydrocapsaicinoids
作者:Harumi Kaga、Masakatsu Miura、Kazuhiko Orito
DOI:10.1055/s-1989-27414
日期:——
Huang-Minlon reduction of 8-methyl-7-oxononanoic acid (4ba), obtained by the acylation of cyclohexanone enamine 2a with 2-methylpropanoyl chloride (1b) followed by ring cleavage of the resultant ß-diketone 3ba affords 8-methylnonanoic acid (5ba), the chloride of which reacts readily with 4-hydroxy-3-methoxybenzylamine to give dihydrocapsaicin (7ba). This reaction sequence works also efficiently for other dihydrocapsaicinoids such as 7aa and 7bb.