... Tetrahedron: Asymmetry. Volume 10, Issue 11, 4 June 1999, Pages 2175–2189. ... After several failed derivatisations with some standard reagents including (S)-mandelic acid/DCC/HOBt [26]and (1R)-camphor-10-sulfonyl chloride/pyridine/DMF, 27 and 28(−)-2 was successfully ...