10.14233/ajchem.2014.16244
The study focuses on the development of a novel catalytic enantioselective method for the synthesis of chiral organoboronates, which are valuable precursors for the preparation of enantio-enriched compounds. The researchers synthesized a novel compound, 1-[2-{(1R,2S)-2-(chloromethyl)cyclopropyl]ethyl}-4-methoxybenzene, through a cyclopropanation reaction using boronate complexes as nucleophiles. Key chemicals used in the study include N,N-diisopropylcarbamoyl chloride, 3-(4-methoxyphenyl)-1-propanol, n-butyl lithium (n-BuLi), allylboronic acid pinacol ester, (-) sparteine, N,N,N,N-tetramethyl-ethylenediamine (TMEDA), 1,3-bis(trifluoromethyl)-5-bromobenzene, N-chlorosuccinimide (NCS), and trichloroisocyanuric acid (TCCA). These chemicals served various purposes, such as reactants, catalysts, and reagents in the synthesis process, with the aim of achieving high yields and enantioselectivity in the production of the target chiral compound. The study also investigated the effects of temperature and the choice of aryllithiums and electrophiles on the yields and stereoselectivity of the reaction.