Axially chiral hemiaminals from nonracemic α‐amino acid derivatives (thiohydantoins): Synthesis and isomer identification
作者:Sevgi Sarigul Ozbek、Ilknur Dogan
DOI:10.1002/chir.23274
日期:2020.11
Stable, nonracemic axially chiral hemiaminals (O,N‐hemiacetals) have been synthesized stereoselectively from lithium aluminum hydride (LiAlH4) reductions of nonracemic 5‐methyl‐ and 5‐isopropyl‐3‐(o‐aryl)‐2‐thioydantoins in tetrahydrofuran (THF) at room temperature in 10 min. Predominantly S‐configured hemiaminals at C‐4 of the heterocyclic ring were produced from the S‐configured thiohydantoins at