Palladium-Catalyzed Asymmetric (3 + 2) Cycloaddition of Vinyl Epoxides with Substituted Propiolates. Enantioselective Formation of 2,3,4-Trisubstituted 2,3-Dihydrofurans
作者:Juan Wang、Yun-Fan Li、Juan Du、Shuai Huang、Chang-Hua Ding、Henry N. C. Wong、Xue-Long Hou
DOI:10.1021/acs.orglett.2c00253
日期:2022.2.25
Alkynyl esters are viable dipolarophiles for the palladium-catalyzedasymmetric (3 + 2) cycloaddition with vinyl epoxides. The chiral dihydrofurans are obtained in high yields and high ee values. The use of a chiral benzylic substituted P,N-ligand is essential. The usefulness of the synthetic method has been demonstrated; 2,3-cis-tetrahydrofuran was also provided.
Vereshchagin,L.I. et al., Journal of Organic Chemistry USSR (English Translation), 1966, vol. 2, p. 524 - 529
作者:Vereshchagin,L.I. et al.
DOI:——
日期:——
Efficient Preparative-Scale Procedures for the Pd-Catalyzed Methoxycarbonylation of Acetylenes
作者:S. F. Vasilevsky、B. A. Trofimov、A. G. Mal'kina、L. Brandsma
DOI:10.1080/00397919408012629
日期:1994.1
A number of acetylenic esters RC drop C-COOCH3 have been prepared in good yields on a preparative scale by Pd-catalyzed methoxycarbonylation of acetylenes RC drop CH.
BESTMANN H. J.; GEISMANN C., J. LIEBIGS ANN. CHEM. <JLAC-BF>, 1977, NO 2, 282-287