Synthesis of Polyhydroxylated Piperidine and Pyrrolidine Peptidomimetics via One-Pot Sequential Lactam Reduction/Joullié–Ugi Reaction
摘要:
A direct approach to the synthesis of poly-hydroxylated piperidine and pyrrolidine peptidomimetics is described. The presented strategy is based on one-pot reduction of sugar-derived lactams with Schwartz's reagent followed by a multicomponent Ugi-Joullie reaction.
A direct approach to the synthesis of indolizidine and quinolizidine scaffolds of iminosugars is described. The presented strategy is based on a one-pot sugar lactam reduction with Schwartz’s reagent followed by a diastereoselective Mannich/Michael tandem reaction of the resulting sugar imine with Danishefsky’s diene. The stereochemical course of the investigated reaction has been explained in detail
Novel Asymmetric Synthesis of an Indolizidine Alkaloid, (+)-Lentiginosine Employing Highly Stereoselective Hydrogenation of α-Hydroxypyrrolidine
作者:Hidemi Yoda、Miho Kawauchi、Kunihiko Takabe
DOI:10.1055/s-1998-1617
日期:1998.2
An efficient and novel process is described for the asymmetric synthesis of a (1S,2S,8aS)-dihydroxyindolizidine alkaloid, (+)-lentiginosine in which the asymmetric deoxygenation of the quaternary α-hydroxypyrrolidine derivative derived from D-xylose is used as a key step.
A direct approach to the synthesis of poly-hydroxylated piperidine and pyrrolidine peptidomimetics is described. The presented strategy is based on one-pot reduction of sugar-derived lactams with Schwartz's reagent followed by a multicomponent Ugi-Joullie reaction.