| abstract |
This invention is directed to stereoselective synthesis of compounds of formula (I) or formula (II): n n n n n n n n n n or a pharmaceutically acceptable salt, ester, amide, complex, chelate, clathrate, solvate, polymorph, stereoisomer, metabolite or prodrug thereof; wherein R 3 , R 4 and R 5 are defined herein. Compounds of formula (I) and formula (II) are known to be useful in treating arrhythmias. |