A new route to 1,4 -diketones and its application to (z)-jasmone and dihydrojasmone synthesis
作者:Goffredo Rosini、Roberto Ballini、Pietro Sorrenti
DOI:10.1016/s0040-4020(01)88632-4
日期:1983.1
(Z)-Jasmone ,dihydrojasmone and other 3-methylcyclo=pent-2-en-1-ones are easily synthesized starting from aldehydes and 1-(2-methyl-1,3-dioxolane-2-yl)-2-nitroethane as reagent for 3-ketobutyl anion synthon. Nitro-aldol condensation is the chainlegthening reaction followed by oxidation and denitration via p-toluenesulfonylhydrazones of the corresponding α-nitroke=tones. Removal of protecting groups
(Z)-茉莉酮,二氢茉莉酮和其他3-甲基环=戊-2-烯-1-酮很容易从醛和1-(2-甲基-1,3-二氧戊环-2-基)-2-硝基乙烷开始合成作为3-酮丁基阴离子合成子的试剂。硝基-醛醇缩合反应是链支化反应,然后通过对甲苯磺酰基hydr将相应的α-硝基酮=酮氧化和脱硝。除去保护基得到1,4-二酮,然后将其用碱环化。