core-scaffolds of naturalproducts presents a promising strategy. Here, we report a naturalproduct inspired synthesis of six different chemotypes and their derivatives for drug discovery research. These bicyclic hetero- and carbocyclic scaffolds are highly novel, rich in sp³ features and with ideal physicochemical properties to display drug likeness. The functional groups on the scaffolds were exploited
Enantioselective Synthesis of
<i>cis</i>
‐Decalin Derivatives by the Inverse‐Electron‐Demand Diels–Alder Reaction of 2‐Pyrones
作者:Xu‐Ge Si、Zhi‐Mao Zhang、Cheng‐Gong Zheng、Zhan‐Ting Li、Quan Cai
DOI:10.1002/anie.202006841
日期:2020.10.12
A novel strategy for the synthesis of cis‐decalins by an ytterbium‐catalyzed asymmetric inverse‐electron‐demand Diels–Alderreaction of 2‐pyrones and silyl cyclohexadienol ethers is reported here. A broad range of synthetically important cis‐decalin derivatives with multiple contiguous stereogenic centers and functionalities are obtained in good yields and stereoselectivities. A full set of diastereomeric
obtained enantiomerically pure by employing the chiral copper-phosphoramidite complex [Cu(OTf)2 L*] as a highly efficient catalyst for their kineticresolution (>99 % ee at 52 % conversion, selectivity S>200). These important building blocks can be obtained on a synthetically interesting scale, as was demonstrated by the successful multigram resolution of 5-methyl-2-cyclohexenone. Tf=trifluoromethanesulfonyl
通过使用手性铜-亚磷酰胺络合物[Cu(OTf)2 L *]作为其动力学拆分的高效催化剂,可以得到对映体纯的多种取代的2-环己酮,如(R)-1 (> 99% ee,转化率为52%,选择性S> 200)。这些重要的结构单元可以以合成有趣的规模获得,如成功的5-甲基-2-环己烯酮的克数解析度所证明的那样。Tf =三氟甲磺酰基。
A simple asymmetric organocatalytic approach to optically active cyclohexenones
Opticallyactive 2,5-disubstituted-cyclohexen-2-one derivatives have been prepared in a one-pot process consisting of five reaction steps: an organocatalytic asymmetric conjugated addition of beta-ketoesters to alpha,beta-unsaturated aldehydes that proceeds in aqueous solutions or under solvent-free conditions has been implemented in a multi-step process.
A catalytic route to acyclic chiral building blocks: Applications of the catalytic asymmetric conjugate addition of organozinc reagents to cyclic enones
作者:Richard B. C. Jagt、Rosalinde Imbos、Robert Naasz、Adriaan J. Minnaard、Ben L. Feringa
DOI:10.1560/nhk0-c8je-27g9-nub3
日期:2001.12
asymmetric conjugateaddition a number of chiral cyclic enones are available with high ee. Here we report the sequential conjugateaddition to these enones as a route towards multisubstituted chiral cyclic ketones. A subsequent Baeyer—Villiger oxidation followed by ring-opening results in various linear synthons containing multiple stereocenters. This procedure represents a short, catalytic, and highly enantioselective