Two Ene–Yne Metathesis Approaches to the Total Synthesis of Amphidinolide P
摘要:
The total synthesis of amphidinolide P was achieved through two different ene-yne metathesis, approaches. In each approach, the metathesis step was performed at late stages in the synthesis with all other functionality present. By forging two successful pathways to the synthesis of 1, some of the strengths and weaknesses of metathesis-intensive synthetic strategies were identified.
Chiral hybrid silica: sol–gel heterogenisation of trans-(1R,2R)-diaminocyclohexane ligands for the rhodium catalysed enantioselective reduction of acetophenone
作者:Anne Brethon、Joël J.E Moreau、Michel Wong Chi Man
DOI:10.1016/j.tetasy.2003.11.005
日期:2004.2
The synthesis of derivatives of trans-(1R,2R)-diaminocyclohexane with different substituents on the nitrogen atoms has been achieved. Rhodium complexes of these chiral ligands were evaluated as homogeneous catalysts for the asymmetric hydride transfer reduction (HTR) of acetophenone leading to moderate selectivities (ee = 0-57%). The silylation of a bromo-aryl derivative was successfully performed by a Heck's coupling reaction with vinyltriethoxysilane in the presence of a palladium catalyst. The immobilisation of this catalyst was then achieved by the sol-gel hydrolysis condensation. The resulting hybrid catalytic materials showed moderate selectivity, although much higher than the related homogeneous catalytic species. (C) 2003 Elsevier Ltd. All rights reserved.
Two Ene–Yne Metathesis Approaches to the Total Synthesis of Amphidinolide P
作者:Edgars Jecs、Steven T. Diver
DOI:10.1021/acs.orglett.5b01601
日期:2015.7.17
The total synthesis of amphidinolide P was achieved through two different ene-yne metathesis, approaches. In each approach, the metathesis step was performed at late stages in the synthesis with all other functionality present. By forging two successful pathways to the synthesis of 1, some of the strengths and weaknesses of metathesis-intensive synthetic strategies were identified.