Development of a Practical and Scalable Synthesis of (<i>R</i>)- and (<i>S</i>)-3-Amino-2-[(benzyloxy)methyl]propan-1-ol Monohydrochloride: A Useful C-4 Chiral Building Block
The development of a practical and scalable synthesis of a C-4 chiral amine building block (R)-1·HCl and (S)-1·HCl is described. This important chiral intermediate (R)-1·HCl is efficiently synthesized from the commercially available, inexpensive, and simple 2-(hydroxymethyl)-1,3-propanediol (31) using lipase-catalyzedenantioselective hydrolysis as a key reaction. Development resulted in a telescoped