Diastereoselective Synthesis of Nitroaldol Derivatives
作者:Dieter Seebach、Albert K. Beck、Triptikumar Mukhopadhyay、Elizabeth Thomas
DOI:10.1002/hlca.19820650402
日期:1982.6.16
Three methods are described by which diastereomerically enriched nitroaldols and their O-silylated derivatives can be prepared. threo-Nitroaldols prevail up to 10:1 over the erythro-isomers if doubly deprotonated nitroaldols 28 are quenched with acetic acid (THF/HMPT or DMPU, − 100°) (see Scheme 5 and Table 2). O-Trimethyl- or O-(t-butyl)dimethylsilylated (TBDMSi) erythro-nitroaldols can be obtained