Improved Synthesis of Methyl 3-oxo-2,6,6-trimethylcyclohex-1-ene-1-carboxylate, an A-ring intermediate for (±)strigol
作者:Qianchao、Pi Shiqing、Chen Xinzhi
DOI:10.3184/030823407x240881
日期:2007.8
Methyl 3-oxo-2,6,6-trimethylcyclohex-1-ene-1-carboxylate was synthesised over eight steps from the starting material of citral instead of α-ionone. KMnO4, HC(OEt)3 and O2/TEMPO/CuCl were substituted for NaIO4, CH3I and pyridinium chlorochromate, respectively. Every step was simplified and gave a 48% overall yield. The procedure is suitable for large scale production.
3-oxo-2,6,6-trimethylcyclohex-1-ene-1-carboxylate 从柠檬醛而不是 α-紫罗兰酮的起始原料经过 8 个步骤合成 3-oxo-2,6,6-trimethylcyclohex-1-ene-1-carboxylate。KMnO4、HC(OEt)3 和 O2/TEMPO/CuCl 分别取代了 NaIO4、CH3I 和氯铬酸吡啶鎓。每一步都被简化,总产率为 48%。该程序适用于大规模生产。