Optically pure (R) allylic alcohols and (R) 4-phenylbutan-2-ols were prepared via oxidative kinetic resolution using whole cells of Candida papapsilosis ATCC 7330.
Accessing Both Retention and Inversion Pathways in Stereospecific, Nickel-Catalyzed Miyaura Borylations of Allylic Pivalates
作者:Qi Zhou、Harathi D. Srinivas、Songnan Zhang、Mary P. Watson
DOI:10.1021/jacs.6b07396
日期:2016.9.14
enable access to eitherenantiomer of allylboronate product from a single enantiomer of readily prepared allylic pivalate substrate. Excellent functional group tolerance, yields, regioselectivities, and stereochemical fidelities are observed. The stereochemical switch from stereoretention to stereoinversion largely depends upon solvent and can be explained by competitive pathways for the oxidative
Copper and neocuproine catalysed synthesis of cinnamyl ether derivatives directly from secondary and tertiary cinnamyl alcohols
作者:Zhenjiao Yang、Yongsheng Zhang、Xingxian Lv、Yang Yang、Chunhao Jiang、Xiaoyan He、Guoliang Chen、Gang Huang、Xiuhong Lu
DOI:10.1039/d2gc01602h
日期:——
The skeletons of secondary and tertiary cinnamyl alcohols are found ubiquitously in natural products and commercial drugs. Due to the easy dehydration of their structures, the etherification of such compounds is often difficult. A new method for the synthesis of secondary and tertiary cinnamyl ether derivatives, employing copper sulfate pentahydrate (CuSO4·5H2O) as a catalyst and neocuproine as a ligand
Enantiospecific, Nickel-Catalyzed Cross-Couplings of Allylic Pivalates and Arylboroxines
作者:Harathi D. Srinivas、Qi Zhou、Mary P. Watson
DOI:10.1021/ol5016724
日期:2014.7.3
We have developed an enantiospecific, nickel-catalyzed cross-coupling of unsymmetric 1,3-disubstituted allylic pivalates with arylboroxines. The success of this reaction relies on the use of BnPPh2 as a supporting ligand for the nickel(0) catalyst and NaOMe as a base. This method shows excellent functional group tolerance and broad scope in both the allylic pivalate and arylboroxine, enabling the preparation of 1,3-diaryl allylic products in high yields with excellent levels of regioselectivity and stereochemical fidelity.
Pd-catalyzed selective oxidation of allyl alcohols to access enones and enals
作者:Ruinan Zhang、Xuan Li、Zhenbo Gao
DOI:10.1016/j.tetlet.2022.153976
日期:2022.8
important in synthesis. Here we report a Pd-catalyzed method to selectively oxidize allylic alcohols to enones and enals at room temperature. 27 compounds, including enones, and enals, have been obtained with moderate to excellent yields. Meanwhile, this approach proceeds well on a preparative scale giving a good yield. This work allows the efficient and selective oxidization of various allylic alcohols