From Enantiopure Hydroxyaldehydes to Complex Heterocyclic Scaffolds: Development of Domino Petasis/Diels-Alder and Cross-Metathesis/Michael Addition Reactions
作者:Alexandre Cannillo、Stéphanie Norsikian、Marie-Elise Tran Huu Dau、Pascal Retailleau、Bogdan I. Iorga、Jean-Marie Beau
DOI:10.1002/chem.201402965
日期:2014.9.15
One‐step assembly of hexahydroisoindole scaffolds by a sequence that combines the Petasis (borono‐Mannich) and Diels–Alder reactions is described. The unique selectivity observed experimentally was confirmed by quantum calculations. The current method is applicable to a broad range of substrates, including free sugars, and holds significant potential to efficiently and stereoselectively build new heterocyclic
We report the first enzyme-catalysed kinetic resolution of epoxy enol esters. The lipase-promoted hydrolysis of these compounds provided alpha-hydroxyketones or alpha-hydroxyaldehydes (arising from the spontaneous rearrangement of the epoxy enols) and the residual esters with moderate to good enantioselectivity (E up to 100). (c) 2006 Elsevier Ltd. All rights reserved.
US7767388B2
申请人:——
公开号:US7767388B2
公开(公告)日:2010-08-03
Fast Synthesis of Complex Enantiopure Heterocyclic Scaffolds by a Tandem Sequence of Simple Transformations on α-Hydroxyaldehydes
作者:Alexandre Cannillo、Stéphanie Norsikian、Pascal Retailleau、Marie-Elise Tran Huu Dau、Bogdan I. Iorga、Jean-Marie Beau
DOI:10.1002/chem.201301712
日期:2013.7.8
Two tandems are faster than one! Properly sequenced reactions initiated by the Petasis aminoalcohol synthesis from boronic acids, diallylamine, and α‐hydroxyaldehydes, including free aldoses, leads to rapid construction of complexenantiopure structures (see scheme).
A Novel Approach to γ-Hydroxy-α,β-unsaturated
Compounds
作者:Henryk Krawczyk、Katarzyna Wąsek、Jacek Kędzia
DOI:10.1055/s-0028-1083162
日期:——
A simple synthesis of (E)-alk-1-enyl mesylates from (E)-alk-1-enylphosphonates is reported. Construction of γ-hydroxy-α,β-unsaturated compounds was achieved by a two-step process involving dihydroxylation of the enol mesylates followed by HWE reaction of the resulting α-hydroxy aldehydes with activated methylphosphonates. Enantioselective synthesis of the title compounds is also reported.