Stereoselective synthesis of methyl (1R) - and (1R) -hemicaronaldehydes from natural tartaric acid: Application to the synthesis of s-bioallethrin and deltamethrin insecticides§
作者:A. Krief、W. Dumont、P. Pasau、Ph. Lecomte
DOI:10.1016/s0040-4020(01)80130-7
日期:1989.1
Very efficient enantioselective syntheses of (1R)--and -hemicaronaldehydes precursors of (1R)-trans chrysanthemic acid and its (1R)-cis dibromovinyl analogue starting from natural tartaric acid or D-mannitol are described. They are based on the reaction between isopropylidenetriphenylphosphorane or isopropylidenediphenylsulfurane and chiral γ-alkoxy-α,β-unsaturated esters. The general problem of the
描述了从天然酒石酸或D-甘露糖醇开始的(1R)-反式菊酸的(1R)-和-半甲基乙醛前体及其(1R)-顺式二溴乙烯基类似物的非常有效的对映选择性合成。它们基于异丙基亚丙基三苯基膦或异丙基二烯基二苯基硫磺与手性γ-烷氧基-α,β-不饱和酯之间的反应。讨论了将非对映选择性加成到这些酯中的一般问题。