the nucleophilic cleavage of the oxirane (4) by the organocuprate derived from 6-lithio-3-ethyl-3,4-dihydro-2H-pyran (3) was the key step in a synthesis of racemic talaromycin B(7).
环氧乙烷(的亲核裂解4)由
有机铜衍生自6-
锂-3-乙基-3,4-二氢-2 ħ
吡喃(3)是外消旋talaromycin B(的合成中的关键步骤7)。