Grubbs Metathesis Enabled by a Light‐Driven
<i>gem</i>
‐Hydrogenation of Internal Alkynes
作者:Tobias Biberger、Raphael J. Zachmann、Alois Fürstner
DOI:10.1002/anie.202007030
日期:2020.10.12
complexes instigate a light‐drivengem‐hydrogenation of internal alkynes with concomitant formation of discrete Grubbs‐type ruthenium carbene species. This unorthodox reactivity mode is harnessed in the form of a “hydrogenative metathesis” reaction, which converts an enyne substrate into a cyclic alkene. The intervention of ruthenium carbenes formed in the actual gem‐hydrogenation step was proven by the
The [2.2.1]-bicyclic ketone 6, a potential synthetic precursor to CP-225,917, was prepared by a sequence beginning with Diels–Alderreactionbetween dimethyl fumarate and the silylatedcyclopentadiene 38. The adduct 40 was subjected to Tamao–Fleming oxidation, which converted it into alcohol 21. During the oxidation BF3·Et2O–AcOH was used instead of the more expensive BF3·2AcOH complex. Alcohol 21
CHIRAL-SUBSTITUTED POLY-N-VINYLPYRROLIDINONES AND COMPLEXES WITH BIMETALLIC NANOCLUSTERS AND USES THEREOF IN ASYMMETRIC OXIDATION REACTIONS
申请人:Kansas State University Research Foundation
公开号:US20220204447A1
公开(公告)日:2022-06-30
Chiral polyvinylpyrrolidinone (CSPVP), complexes of CSPVP with a core species, such as a bimetallic nanocluster catalyst, and enantioselective oxidation reactions utilizing such complexes are disclosed. The catalytic complexes have exhibited the ability to achieve reaction products have a very high degree of optical purifies. These reaction products can be used as reagents in the synthesis of complex organic molecules, such as bioactive products, and C—H bond oxidation of complex molecules including various drugs and natural products.