Enantioselective Synthesis of the AB-Ring System of the Antitumor Antibiotic Tetrazomine
作者:Peter Wipf、Corey R. Hopkins
DOI:10.1021/jo015512q
日期:2001.5.1
4-tetrahydroisoquinoline moiety of tetrazomine was accomplished in 18 steps and in 3% overall yield from commercially available o-anisaldehyde. The reaction sequence utilizes a Sharpless asymmetric dihydroxylation to install the stereocenter and an intramolecular Friedel--Crafts hydroxyalkylation with an N-protected 2-oxo-acetamide to close the heterocyclic ring.