Dienol Research Articles

Investigation of Pd(II)-Catalyzed Cyclization of Chiral θ-Hydroxy-α,β,γ,δ-unsaturated Dienol

Investigation of Pd(II)-Catalyzed Cyclization of Chiral θ-Hydroxy-α,β,γ,δ-unsaturated Dienol

An Enone−Dienol Tautomerism and an Iron(III)-Catalyzed Dimerization of Cycloalkenone-2-carboxylates

An Enone−Dienol Tautomerism and an Iron(III)-Catalyzed Dimerization of Cycloalkenone-2-carboxylates

Tautomerism in 2,2?-bipyridyl-3,3?-diol

Three stable tautomeric forms, dienol (DE), ketoenol (KE), and diketo (DK), of 2,2′-bipyridyl-3,3′-diol BP(OH)2 were found in this study, using the semiempirical AM1 and MNDO-PM3 and ab initio (4-31G basis set) methods. All calculations were carried out without any symmetry restrictions. There is a good agreement between the ab initio calculated and experimentally obtained structural parameters for the DE tautomer. Transition structures, corresponding to the DK KE and KE DE processes have also been found. On the basis of the results from the present work, an asynchronous (two-step) DK KE DE mechanism of the IPT reaction in BP(OH)2 is proposed. © 1996 John Wiley & Sons, Inc.

Tautomerism in 2,2′‐bipyridyl‐3,3′‐diol

Three stable tautomeric forms, dienol (DE), ketoenol (KE), and diketo (DK), of 2,2′-bipyridyl-3,3′-diol BP(OH)2 were found in this study, using the semiempirical AM1 and MNDO-PM3 and ab initio (4-31G basis set) methods. All calculations were carried out without any symmetry restrictions. There is a good agreement between the ab initio calculated and experimentally obtained structural parameters for the DE tautomer. Transition structures, corresponding to the DK → KE and KE → DE processes have also been found. On the basis of the results from the present work, an asynchronous (two-step) DK → KE → DE mechanism of the IPT reaction in BP(OH)2 is proposed. © 1996 John Wiley & Sons, Inc.

Polycycle construction via cascade radical fragmentation transannulation-cyclisation processes

Treament of the bicyclic dienol (8) with iodosylbenzene diacetate-iodine is shown to lead to the 7,5,-tricycle (11, 81%) by way of a cascade ra

Iodotrimethylsilane-mediated additions of dienol silyl ethers to .alpha.,.beta.-unsaturated ketones

Les dienes substitues par un groupe trimethylsiloxy reagissent avec la methyl-2 cyclohexenone en presence de (CH 3 ) 3 SiI pour donner les composes bicycliques correspondants

ChemInform Abstract: THE USE OF 1‐PHENYLTHIOPROP‐1‐YNE AS AN EQUIVALENT OF PHENYLTHIOPROPANONE IN ALDOL CONDENSATIONS

AbstractDas aus dem Thioether (I) zugängliche Lithio‐phenylthiopropadien (II) addiert sich an Ketone (III) zu einem Gemisch der Alkohole (IV) und (V), von denen die Allenylalkohole (IV) über die instabilen Trifluoracetate (VI) zu den Umlagerungsprodukten (VII) führen.

The mechanism of aromatization of some epoxyhydroxysteroids

The 17β-acetoxy-4,5-epoxyandrostan-3β-ols have been shown to yield 17β-acetoxy-4-methyloestra-1,3,5-triene by a dienol–benzene pathway.