Sulphenylation and halogenation reactions leading selectively to cis-carbapenem precursors; stereospecific synthesis of (±)-6-epithienamycin
作者:John H. Bateson、Alison M. Quinn、Robert Southgate
DOI:10.1039/c39860001151
日期:——
Introduction of sulphenyl or halogen substituents at C-7 of ketone (1), followed by stereospecific reduction steps, provides a selective route either to the (6RS,7RS,9RS) or to the (6RS,7RS,9RS) isomers, (10) and (11), of 7-(1-hydroxyethyl)-8-oxo-1-aza-3-oxabicyclo[4.2.0]octane-2-spirocyclohexane.
在C-7酮(的硫基或卤素的取代基引入1),随后通过立体有择还原步骤,提供了一种选择性的路线或者到(6个RS,7个RS,9个RS)或所述(6个RS,7个RS,9 7-(1-羟乙基)-8-氧代-1-氮杂-3-氧杂双环[4.2.0]辛烷-2-螺环己烷的RS)异构体(10)和(11)。