Reactivity studies in the shikimic acid series: The synthesis of racemic methyl 6α-fluoroshikimate
作者:Stephen A. Bowles、Malcolm M. Campbell、Malcolm Sainsbury、Gareth M. Davies
DOI:10.1016/s0040-4020(01)90533-2
日期:1990.1
The regio- and stereo-selective epoxidation of methyl 3,4-dihydrobenzoate derivatives has been investigated. Perbenzimidic acid leads only to epoxides formed at the Δ1,2 bond. More electrophilic reagents such as MCPBA also give products of this type, as well as epoxides formed through attack at the Δ5,6 bond. Reactions of the 3,4-dihydrobenzoates with thiophenate anion have been undertaken as a means
已经研究了3,4-二氢苯甲酸甲酯衍生物的区域和立体选择性环氧化。Perbenzimidic酸仅导致在Δ形成环氧化物1,2-键。更多的亲电试剂(例如MCPBA)也可以提供这种类型的产物,以及通过攻击Δ5,6键形成的环氧化物。3,4- dihydrobenzoates与thiophenate阴离子的反应已经进行作为保护Δ的手段1,2-键,并由此控制环氧化的区域选择性。通过3,4-二氢-3,4-异丙基二烯二氧基苯甲酸甲酯的环氧化物的开环,已经实现了外消旋6α-氟代草酸甲酯的合成。