An efficient synthesis of α,β-unsaturated ketones based on reaction of alkenylcopper(1)reagents with selenoesters (or acylchlorides) has been elaborated.
已经详细阐述了基于链烯基铜(1)试剂与硒酸酯(或酰氯)反应的α,β-不饱和酮的有效合成方法。
Asymmetric Synthesis of the Cytotoxic Marine Natural Product (+)-Awajanomycin and Its C-11 Epimer
the use of (R)-18 as the chiral building block to construct the γ-lactone-δ-lactam core 3 and cross-olefin metathesis as the key reaction to couple the latter with the allylicalcohol segment (R- or S-4). The efficient construction of the core 3 was realized by taking advantage of the inherent multiple reactivities of the chiral building block (R)-18. A highly diastereoselective one-pot transformation
This application relates to derivatives of hydrocarbon terpenes (e.g., myrcene or farnesene), to methods of making the derivatives, and to the use of the derivatives as surfactants.
An expedient osmium(<scp>vi</scp>)/K<sub>3</sub>Fe(CN)<sub>6</sub>-mediated selective oxidation of benzylic, allylic and propargylic alcohols
作者:Rodney A. Fernandes、Venkati Bethi
DOI:10.1039/c4ra07500e
日期:——
A chemoselective osmium(VI) catalyzed oxidation of benzylic, allylic and propargylic alcohols using K3Fe(CN)6 as a secondary oxidant is described. This protocol is operationally simple and exhibits excellent chemoselectivity favouring the oxidation of benzylic alcohols over the aliphatic alcohols. A larger scale reaction was also found to be compatible.
α-Selenoenones could be employed as Z-allyl precursors in the chiral amine-catalyzed asymmetric conjugate addition of aldehydes. The obtained formal allylation product, a Z-olefin having a sulfonate leaving group, was employed as a synthetically useful chiral alkylating agent.