Catalytic Enantioselective 1,4-Iodofunctionalizations of Conjugated Dienes
摘要:
The first catalytic enantioselective 1,4-iodofunctionalizations of conjugated dienes have been developed. Starting from beta,gamma,delta,epsilon-unsaturated oximes and 4-Ns hydrazones, these N-iodosuccinimide-mediated reactions are catalyzed by newly modified tertiary aminothiourea derivatives and furnish Delta(2)-isoxazoline and Delta(2)-pyrazoline derivatives, respectively, containing an (E)-allyl iodide group at the quaternary stereogenic center generally in high yield and with excellent enantioselectivity (up to 98.5:1.5 er).
A Synthesis of the C3-C15 Fragment of the Archazolids
作者:Gregory O’Neil、Matthew Black
DOI:10.1055/s-0029-1218537
日期:2010.1
Ring-closing metathesis and an allylation-elimination reaction sequence have been used to complete a synthesis of the conjugated triene subunit of the archazolids.