Deprotonation of α-amido sulfones 7 with BunLi at -90°C followed by reaction with electrophiles leads, depending on the substitution on the amidic nitrogen to enamides 10 (secondary amides 7a,b) or functionalised α-amido sulfones 12 (tertiary amides 7c,d).
O-tert-Butyl-N-(chloromethyl)-N-methyl carbamate as a source of the MeNHCH2− synthon
作者:Albert Guijarro、Javier Ortiz、Miguel Yus
DOI:10.1016/0040-4039(96)01134-3
日期:1996.7
The reaction of O-tert-butyl-N-(chloromethyl)-N-methylcarbamate (1) with lithium powder and a catalytic amount of DTBB (2.5 mol %) in the presence of different electrophiles [Me3SiCl, BuiCHO, ButCHO, PhCHO, (CH2)4CO, Et2CO, PhCOMe, Ph2CO] in THF at −78°C leads, after hydrolysis with water, to the expected functionalised carbamates 2. As an example, the hydrolysis of compound 2e with hydrogen chloride