. Separation of the pure beta-anomer and deprotection affords lamivudine. Alternatively, racemic acid (XV) may be prepared from glyoxylic acid (XIV) and resolution using a suitable chiral base such as norephedrine would afford the chiral acid (XVI), which may be esterified prior to coupling ...
need growing attention because the classical method of adsorbing CO2using amine solution has various drawbacks, including less economical regeneration and equipment corrosion. Zeolites and activated carbon are the primary solid adsorbents for CO2capture. In contrast, porous materials are an alternate ...
POCl3 to give 2 - chloro - 5 - nitro - pyridine - 3 - sulphonyl chloride; this chloride is converted into the Na salt of 2-chloro - 5 - nitro - pyridine - 3 - sulphonate by Na2CO3 and this nitro compound is reduced to the corresponding amine by the Bechamp method using Fe powder...