The n.m.r. spectra of the four geometrical isomers of β-aminoenones, trans-s-trans, trans-s-cis, cis-s-trans, and cis-s-cis, are discussed. It was found that the chemical shift of the α-proton of β-aminoenones depends on both anisotropic effects and the electron density: δ=δ0–Δδstruc=ΔδAr+K(q–q0). Thus the conformation of non-rigid β-aminoenones can be determined from the observed and the calculated
convenient procedure for the synthesis of homoallylic alcohols from carbonyl compounds and allylboranes is described. Allyl-, 2-methylallyl-, crotyl- and 3,3-dimethylallyl(dialkyl)boranes, as well as diallyl(alkyl)boranes and derivatives of 3-allyl- and 3-metallyl-3-borabicyclo[3.3.1]non-6-ene are effective reagents for allylation of carbonyl compounds (aldehydes, ketones, esters, carboxylic acids and others)
Synthesis of the Naphthalenone, Dihydroquinoline, and Dihydrofuran Derivatives
作者:Füsun Şeyma Güngör、Olcay Anaç、Özkan Sezer
DOI:10.1002/hlca.201000386
日期:2011.6
The reactions of enaminones with dimethyl diazomalonate were investigated in the presence of copper(II) acetylacetonate. From the reaction of (E)‐3‐[methyl(phenyl)amino]‐1‐phenylprop‐2‐en‐1‐one (6c), dimethyl 2‐[methyl(phenyl)amino]‐4‐oxonaphthalene‐1,1‐(4H)‐dicarboxylate, was unexpectedly obtained as the major product. Quinoline derivatives were formed as the major products in the case of N‐methyl‐p‐anisidino
Das Gerüst derRingeIbisVdes heptacyclischen Strychnins wird durch Synthesedes racemischen Dilactams 14a aus Lävulinsäure, Phenylhydrazin, Acetylacetaldehyd (als Dimethylacetal) und Malonsäure-ethylester-chlorid aufgebaut.
Benzoxazolinones. IV. Reaction of benzoxazolinone and benzoxazolinethione with alkyl β-chlorovinyl ketones
作者:R. G. Aflyatunova、N. A. Aliev、Ch. Sh. Kadyrov、M. R. Yagudaev
DOI:10.1007/bf00575713
日期:1983.7
The reactions of benzoxazolinone and benzoxazolinethione with alkyl β-chlorovinylketones have been studied. The reaction products are N-(β-acylvinyl)benzoxazolinones and N-(β-acylvinyl)benzoxazolinethiones. The reaction of alkali-metal salts of benzoxazolinone with alkyl β-chlorovinylketones leads to the opening of the oxazolinone ring. The structures of the compounds synthesized have been studied