Vicinally substituted cyclopentenes and cyclopentenones from (±)-7,7-dichlorobicyclo[3.2.0]hept-2-en-6-one
作者:V. A. Akhmet’yanova、N. A. Ivanova、Z. R. Valiullina、M. S. Miftakhov
DOI:10.1134/s1070428015030057
日期:2015.3
Solvolysis of (±)-7,7-dichlorobicyclo[3.2.0]hept-2-en-6-one in a mixture of tert-butyl alcohol with water and triethylamine, followed by successive treatment with K2CO3, NaBH4, and CH2N2, gave methyl 2-(hydroxymethyl)cyclopent-2-ene-1-carboxylate which was subjected to hydride reduction, epoxidation, trichloroacetimidation, and acetylation. Allylic oxidation of methyl 2-(acetoxymethyl)cyclopent-2-ene-1-carboxylate
(±)-7,7-二氯双环[3.2.0]庚-2-烯-6-酮在叔丁醇与水和三乙胺的混合物中溶剂化,然后依次用K 2 CO 3,NaBH 4处理,和CH 2 N 2,得到2-(羟甲基)环戊-2-烯-1-羧酸甲酯,将其进行氢化还原,环氧化,三氯乙酰亚胺化和乙酰化。2-(乙酰氧基甲基)环戊-2-烯-1-羧酸甲酯与氧化铬(VI)-3,5-二甲基吡唑配合物的烯丙基氧化得到2-(乙酰氧基甲基)-4-氧代环戊-2-烯-1-甲酸甲酯羧酸盐和甲基(1 R *,2 R *,5 R将*)-1-(羟甲基)-6-氧杂双环[3.1.0]-己烷-2-羧酸酯转化为合成脱氧entecavir和肉瘤霉素甲酯的结构单元。