Indium-mediated Barbier-type allylation of aldehydes as a convenient method for the highly enantioselective synthesis of homoallylic alcohols
作者:Lacie C. Hirayama、Soya Gamsey、Daniel Knueppel、Derek Steiner、Kelly DeLaTorre、Bakthan Singaram
DOI:10.1016/j.tetlet.2005.01.169
日期:2005.3
enantioselective allylation of both aromatic and aliphatic aldehydes using commercially available (1S,2R)-(+)-2-amino-1,2-diphenylethanol as a chiral auxiliary. Using only two equivalents of allyl bromide, excellent yields and very good to excellent enantioselectivities are obtained. To our knowledge, the enantioselectivities reported herein are the highest obtained for indium-promoted allylations of carbonyl
Alkene <i>Syn</i>- and <i>Anti</i>-Oxyamination with Malonoyl Peroxides
作者:Jonathan M. Curle、Marina C. Perieteanu、Philip G. Humphreys、Alan R. Kennedy、Nicholas C. O. Tomkinson
DOI:10.1021/acs.orglett.0c00253
日期:2020.2.21
Malonoyl peroxide 6 is an effective reagent for the syn- or anti-oxyamination of alkenes. Reaction of 6 and an alkene in the presence of O-tert-butyl-N-tosylcarbamate (R3 = CO2tBu) leads to the anti-oxyaminated product in up to 99% yield. Use of O-methyl-N-tosyl carbamate (R3 = CO2Me) as the nitrogen nucleophile followed by treatment of the product with trifluoroacetic acid leads to the syn-oxyaminated
methodology concerning the Pd(II)-catalyzed intermolecular difunctionalization of conjugateddienes is reported to synthesize a series of functionalized morpholines and 2-morpholones. Widely distributed and easily obtained β-amino alcohols and α-amino acids, as starting nitrogen and oxygen sources, are successfully applied in the difunctionalization of conjugateddienes respectively. The majority of the desired
OSMIUM-CATALYZED VICINAL OXYAMINATION OF OLEFINS BY CHLORAMINE-T: cis-2-(p-TOLUENESULFONAMIDO)CYCLOHEXANOL AND 2-METHYL-3-(p-TOLUENESULFONAMIDO)-2-PENTANOL
作者:Herranz, Eugenio、Sharpless, K. Barry
DOI:10.15227/orgsyn.061.0085
日期:——
Pratesi et al., Farmaco, Edizione Scientifica, 1955, vol. 10, p. 673,682