Stereochemical Studies of the Opening of Chloro Vinyl Epoxides: Cyclic Chloronium Ions as Intermediates
作者:Andrej Shemet、David Sarlah、Erick M. Carreira
DOI:10.1021/acs.orglett.5b00558
日期:2015.4.17
A systematic study of the opening of a collection of chlorinated vinyl epoxides is reported, which includes experiments that implicate both five- and four-membered chloronium ions as plausible intermediates in this type of epoxideopening reaction.
First stereoselective total synthesis and anticancer activity of new amide alkaloids of roots of pepper
作者:Ch. Srinivas、Ch.N.S. Sai Pavan Kumar、B. China Raju、V. Jayathirtha Rao、V.G.M. Naidu、S. Ramakrishna、Prakash V. Diwan
DOI:10.1016/j.bmcl.2009.08.056
日期:2009.10
The first stereoselectivetotalsynthesis of new natural amide alkaloids 1–3 have been achieved from commercially available starting materials. Wittig olefination, Sharpless asymmetric dihydroxylation, epoxidation, a trans regioselective opening of 2,3-epoxy alcohol, Horner–Wadsworth–Emmons (HWE) olefination and amide coupling are the key steps. The amide alkaloids 1–3 are evaluated for their anticancer
Spiro asymmetric induction. 3. Synthesis of optically pure syn- or anti-.alpha.,.beta.-dihydroxy esters by the aldol condensation of chiral glycolate enolates
作者:William H. Pearson、Minn Chang Cheng
DOI:10.1021/jo00390a044
日期:1987.7
LEASSON, W. H.;CHENG, MINN-CHANG, J. ORG. CHEM., 52,(1987) N 14, 3176-3178