Rhodium-catalyzed intramolecular reductive aldol-type cyclization: Application for the synthesis of a chiral necic acid lactone.
Motoyuki IsodaKazuyuki SatoKenta KamedaKana WakabayashiRyota SatoHideki MinamiYukiko KaruoAtsushi TaruiKentaro KawaiMasaaki OmotePublished in: Beilstein journal of organic chemistry (2022)
A rhodium-catalyzed intramolecular reductive aldol-type cyclization is described to give β-hydroxylactones with high diastereoselectivities. The stereoselectivity of this cyclization is highly solvent dependent and can give syn - or anti -β-hydroxylactones with high diastereoselectivity. This methodology was also applied to the synthesis of a chiral necic acid lactone which is a structural component of the pyrrolizidine alkaloid monocrotaline.