Concise Substrate-Controlled Asymmetric Total Syntheses of Dioxabicyclic Marine Natural Products with 2,10-Dioxabicyclo-[7.3.0]dodecene and 2,9-Dioxabicyclo[6.3.0]undecene Skeletons
作者:Mi Jung Kim、Te-ik Sohn、Deukjoon Kim、Robert S. Paton
DOI:10.1021/ja310249u
日期:2012.12.12
0]undecene skeleton from commercially available glycidol as a common starting material. The former include (-)-isolaurallene (1), the enantiomeric form of natural (+)-neolaurallene (2), and (+)-itomanallene A (3c), and the latter are (+)-laurallene (4) and (+)-pannosallene (5a). In addition, our first syntheses of 3c and 5a established the structure and absolute stereochemistry of both natural products
In control: The first asymmetric total synthesis of (+)‐itomanallene A (revised structure) has been accomplished starting from commercially available (S)‐glycidol in a substrate‐controlled fashion. The approach yields α,α′‐cis‐ or α,α′‐trans‐tetrahydrofuran isomers by intramolecular alkylation with either an amide enolate or a nitrile anion, respectively.