Synthesis of racemic, 2-(alkylthio)-6-(1-hydroxyethyl) penems; attempted penem synthesis copper (I) - promoted cyclisations
作者:S.W. McCombie、A.K. Ganguly、V.M. Girijavallabhan、P.D. Jeffrey、S. Lin、P. Pinto、A.T. McPhail
DOI:10.1016/s0040-4039(01)81939-0
日期:1981.1
Stereocontrolled syntheses of the diastereoisomeric 6-(1-hydroxyethyl)-2-ethylthio and 2-(2-aminoethylthio)-penem-3-carboxylates from a common monocyclic azetidinone precursor are described. Cu (I)-promoted cyclisation of suitable N/C-3 secopenems is shown to yield “isopenems” (7-oxo-2-thia-1-azabicyc1o[3.2.0]-hept-3-enes) as the sole bicyclic product.
描述了由常见的单环氮杂环丁酮前体的非对映异构体6-(1-羟乙基)-2-乙硫基和2-(2-氨基乙硫基)-penem-3-羧酸酯的立体控制合成。铜(I)促进合适的N / C-3 secopenems的环化反应可产生“ isopenems”(7-氧代-2-thia-1-azabicyc10o [3.2.0]-庚-3-烯)作为唯一的双环产品。