US Patent 6,753,414
United States Patent and Trademark Office
University of Iowa Research Foundation (Iowa City, IA, US)
A process for preparing compounds of formula (1): including the convergent steps as defined in the specification, and wherein R groups have any of the values defined in the specification. The invention also provides processes and intermediates useful for preparing compounds of formula (1).
Jin, Zhendong and Yu, Wensheng Process for preparing saponin compounds. US Patent 6,753,414 filed August 06, 2002 and issued June 22, 2004. https://ir.uiowa.edu/patents/358