Scheme 4.
Representative functionalization of chiral allylic boronates.E:Z by analysis of 1H NMR spectra of unpurified mixtures. Yields of purified products (±5%). Enantioselectivity was determined by HPLC analysis (±1%). For compounds 8f and 10, isolated by pentane wash of solid product; e.r. might be higher than allylic boronate. See the Supporting Information for details.